diff --git a/clients/client-accessanalyzer/src/AccessAnalyzerClient.ts b/clients/client-accessanalyzer/src/AccessAnalyzerClient.ts
index 8be3e7b757309..64a9830b75008 100644
--- a/clients/client-accessanalyzer/src/AccessAnalyzerClient.ts
+++ b/clients/client-accessanalyzer/src/AccessAnalyzerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -187,7 +188,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-account/src/AccountClient.ts b/clients/client-account/src/AccountClient.ts
index 0b28e9a6d0b45..1b99be174cede 100644
--- a/clients/client-account/src/AccountClient.ts
+++ b/clients/client-account/src/AccountClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -97,7 +98,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-acm-pca/src/ACMPCAClient.ts b/clients/client-acm-pca/src/ACMPCAClient.ts
index 9d6279d19b3c6..f648c89a125ca 100644
--- a/clients/client-acm-pca/src/ACMPCAClient.ts
+++ b/clients/client-acm-pca/src/ACMPCAClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -187,7 +188,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-acm/src/ACMClient.ts b/clients/client-acm/src/ACMClient.ts
index 171dc6861a46e..c6caa3026b247 100644
--- a/clients/client-acm/src/ACMClient.ts
+++ b/clients/client-acm/src/ACMClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -148,7 +149,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-alexa-for-business/src/AlexaForBusinessClient.ts b/clients/client-alexa-for-business/src/AlexaForBusinessClient.ts
index 931f5154a5282..228d75e583b58 100644
--- a/clients/client-alexa-for-business/src/AlexaForBusinessClient.ts
+++ b/clients/client-alexa-for-business/src/AlexaForBusinessClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -475,7 +476,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-amp/src/AmpClient.ts b/clients/client-amp/src/AmpClient.ts
index e5d01b3eea859..1d1f0b1ff49af 100644
--- a/clients/client-amp/src/AmpClient.ts
+++ b/clients/client-amp/src/AmpClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -163,7 +164,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-amplify/src/AmplifyClient.ts b/clients/client-amplify/src/AmplifyClient.ts
index d04e4613720b3..c726b5f6359ec 100644
--- a/clients/client-amplify/src/AmplifyClient.ts
+++ b/clients/client-amplify/src/AmplifyClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -220,7 +221,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-amplifybackend/src/AmplifyBackendClient.ts b/clients/client-amplifybackend/src/AmplifyBackendClient.ts
index 45fc8adb1e889..07dcefee2e9db 100644
--- a/clients/client-amplifybackend/src/AmplifyBackendClient.ts
+++ b/clients/client-amplifybackend/src/AmplifyBackendClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -199,7 +200,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-amplifyuibuilder/src/AmplifyUIBuilderClient.ts b/clients/client-amplifyuibuilder/src/AmplifyUIBuilderClient.ts
index 54d71506184e7..4530a40e142cb 100644
--- a/clients/client-amplifyuibuilder/src/AmplifyUIBuilderClient.ts
+++ b/clients/client-amplifyuibuilder/src/AmplifyUIBuilderClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -124,7 +125,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-api-gateway/src/APIGatewayClient.ts b/clients/client-api-gateway/src/APIGatewayClient.ts
index 90bae21b5fed6..b587905df3b2c 100644
--- a/clients/client-api-gateway/src/APIGatewayClient.ts
+++ b/clients/client-api-gateway/src/APIGatewayClient.ts
@@ -36,6 +36,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -548,7 +549,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-apigatewaymanagementapi/src/ApiGatewayManagementApiClient.ts b/clients/client-apigatewaymanagementapi/src/ApiGatewayManagementApiClient.ts
index ca490e8f14944..81affc1e6e373 100644
--- a/clients/client-apigatewaymanagementapi/src/ApiGatewayManagementApiClient.ts
+++ b/clients/client-apigatewaymanagementapi/src/ApiGatewayManagementApiClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -85,7 +86,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-apigatewayv2/src/ApiGatewayV2Client.ts b/clients/client-apigatewayv2/src/ApiGatewayV2Client.ts
index daaf7e6213850..f4349ece978ca 100644
--- a/clients/client-apigatewayv2/src/ApiGatewayV2Client.ts
+++ b/clients/client-apigatewayv2/src/ApiGatewayV2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -334,7 +335,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-app-mesh/src/AppMeshClient.ts b/clients/client-app-mesh/src/AppMeshClient.ts
index 946dd3b433bcd..ece4af3911ffc 100644
--- a/clients/client-app-mesh/src/AppMeshClient.ts
+++ b/clients/client-app-mesh/src/AppMeshClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -244,7 +245,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-appconfig/src/AppConfigClient.ts b/clients/client-appconfig/src/AppConfigClient.ts
index ca7ac55543f62..0275004a21dfc 100644
--- a/clients/client-appconfig/src/AppConfigClient.ts
+++ b/clients/client-appconfig/src/AppConfigClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -226,7 +227,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-appconfigdata/src/AppConfigDataClient.ts b/clients/client-appconfigdata/src/AppConfigDataClient.ts
index 8144eebc4a763..e5ebe3c6b48e6 100644
--- a/clients/client-appconfigdata/src/AppConfigDataClient.ts
+++ b/clients/client-appconfigdata/src/AppConfigDataClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -87,7 +88,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-appflow/src/AppflowClient.ts b/clients/client-appflow/src/AppflowClient.ts
index a826727713683..73a8e0d3f0289 100644
--- a/clients/client-appflow/src/AppflowClient.ts
+++ b/clients/client-appflow/src/AppflowClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -172,7 +173,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-appintegrations/src/AppIntegrationsClient.ts b/clients/client-appintegrations/src/AppIntegrationsClient.ts
index 829816c79240e..b23b0af64a4fe 100644
--- a/clients/client-appintegrations/src/AppIntegrationsClient.ts
+++ b/clients/client-appintegrations/src/AppIntegrationsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -160,7 +161,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-application-auto-scaling/src/ApplicationAutoScalingClient.ts b/clients/client-application-auto-scaling/src/ApplicationAutoScalingClient.ts
index 6a28d3793af63..e39018cffee63 100644
--- a/clients/client-application-auto-scaling/src/ApplicationAutoScalingClient.ts
+++ b/clients/client-application-auto-scaling/src/ApplicationAutoScalingClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -133,7 +134,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-application-discovery-service/src/ApplicationDiscoveryServiceClient.ts b/clients/client-application-discovery-service/src/ApplicationDiscoveryServiceClient.ts
index f4b4a658b962b..6b3030dd83e3c 100644
--- a/clients/client-application-discovery-service/src/ApplicationDiscoveryServiceClient.ts
+++ b/clients/client-application-discovery-service/src/ApplicationDiscoveryServiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -199,7 +200,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-application-insights/src/ApplicationInsightsClient.ts b/clients/client-application-insights/src/ApplicationInsightsClient.ts
index 0f3e1a621b7b0..034a48671865b 100644
--- a/clients/client-application-insights/src/ApplicationInsightsClient.ts
+++ b/clients/client-application-insights/src/ApplicationInsightsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -184,7 +185,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-applicationcostprofiler/src/ApplicationCostProfilerClient.ts b/clients/client-applicationcostprofiler/src/ApplicationCostProfilerClient.ts
index 4e5af99d4d2f1..2f18a37d457ca 100644
--- a/clients/client-applicationcostprofiler/src/ApplicationCostProfilerClient.ts
+++ b/clients/client-applicationcostprofiler/src/ApplicationCostProfilerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -115,7 +116,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-apprunner/src/AppRunnerClient.ts b/clients/client-apprunner/src/AppRunnerClient.ts
index 747e8d7e75efc..4cde0eda0684a 100644
--- a/clients/client-apprunner/src/AppRunnerClient.ts
+++ b/clients/client-apprunner/src/AppRunnerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -184,7 +185,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-appstream/src/AppStreamClient.ts b/clients/client-appstream/src/AppStreamClient.ts
index 983598df6fa70..f3ee57cf2713b 100644
--- a/clients/client-appstream/src/AppStreamClient.ts
+++ b/clients/client-appstream/src/AppStreamClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -352,7 +353,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-appsync/src/AppSyncClient.ts b/clients/client-appsync/src/AppSyncClient.ts
index 93afcd984ff72..aa3a215e497b2 100644
--- a/clients/client-appsync/src/AppSyncClient.ts
+++ b/clients/client-appsync/src/AppSyncClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -241,7 +242,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-athena/src/AthenaClient.ts b/clients/client-athena/src/AthenaClient.ts
index 578995b022076..09ea8780a0543 100644
--- a/clients/client-athena/src/AthenaClient.ts
+++ b/clients/client-athena/src/AthenaClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -208,7 +209,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-auditmanager/src/AuditManagerClient.ts b/clients/client-auditmanager/src/AuditManagerClient.ts
index c4a1a6163151d..8e0cf14d993f3 100644
--- a/clients/client-auditmanager/src/AuditManagerClient.ts
+++ b/clients/client-auditmanager/src/AuditManagerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -373,7 +374,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-auto-scaling-plans/src/AutoScalingPlansClient.ts b/clients/client-auto-scaling-plans/src/AutoScalingPlansClient.ts
index a8cce3a2c46df..ede2733355032 100644
--- a/clients/client-auto-scaling-plans/src/AutoScalingPlansClient.ts
+++ b/clients/client-auto-scaling-plans/src/AutoScalingPlansClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -106,7 +107,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-auto-scaling/src/AutoScalingClient.ts b/clients/client-auto-scaling/src/AutoScalingClient.ts
index d699d289fd597..337f9022ddfe0 100644
--- a/clients/client-auto-scaling/src/AutoScalingClient.ts
+++ b/clients/client-auto-scaling/src/AutoScalingClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -388,7 +389,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-backup-gateway/src/BackupGatewayClient.ts b/clients/client-backup-gateway/src/BackupGatewayClient.ts
index 28a123242ebc4..821c23f812f60 100644
--- a/clients/client-backup-gateway/src/BackupGatewayClient.ts
+++ b/clients/client-backup-gateway/src/BackupGatewayClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -151,7 +152,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-backup/src/BackupClient.ts b/clients/client-backup/src/BackupClient.ts
index 739e4415c0b1b..106a1571e8fac 100644
--- a/clients/client-backup/src/BackupClient.ts
+++ b/clients/client-backup/src/BackupClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -370,7 +371,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-batch/src/BatchClient.ts b/clients/client-batch/src/BatchClient.ts
index db7a523f0d78f..2ac2f5c1707bb 100644
--- a/clients/client-batch/src/BatchClient.ts
+++ b/clients/client-batch/src/BatchClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -190,7 +191,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-braket/src/BraketClient.ts b/clients/client-braket/src/BraketClient.ts
index 715296fa7dffb..cb108f5c3f638 100644
--- a/clients/client-braket/src/BraketClient.ts
+++ b/clients/client-braket/src/BraketClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -121,7 +122,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-budgets/src/BudgetsClient.ts b/clients/client-budgets/src/BudgetsClient.ts
index 2c141708b7a17..72bfb8093a429 100644
--- a/clients/client-budgets/src/BudgetsClient.ts
+++ b/clients/client-budgets/src/BudgetsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -175,7 +176,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-chime-sdk-identity/src/ChimeSDKIdentityClient.ts b/clients/client-chime-sdk-identity/src/ChimeSDKIdentityClient.ts
index c32c32613295b..aeacfe027327e 100644
--- a/clients/client-chime-sdk-identity/src/ChimeSDKIdentityClient.ts
+++ b/clients/client-chime-sdk-identity/src/ChimeSDKIdentityClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -205,7 +206,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-chime-sdk-meetings/src/ChimeSDKMeetingsClient.ts b/clients/client-chime-sdk-meetings/src/ChimeSDKMeetingsClient.ts
index e0c30c1c67000..31341ada678ac 100644
--- a/clients/client-chime-sdk-meetings/src/ChimeSDKMeetingsClient.ts
+++ b/clients/client-chime-sdk-meetings/src/ChimeSDKMeetingsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -124,7 +125,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-chime-sdk-messaging/src/ChimeSDKMessagingClient.ts b/clients/client-chime-sdk-messaging/src/ChimeSDKMessagingClient.ts
index 45229b9efd872..f09c336ec3a9f 100644
--- a/clients/client-chime-sdk-messaging/src/ChimeSDKMessagingClient.ts
+++ b/clients/client-chime-sdk-messaging/src/ChimeSDKMessagingClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -298,7 +299,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-chime/src/ChimeClient.ts b/clients/client-chime/src/ChimeClient.ts
index e2535cd1da197..302c98456727b 100644
--- a/clients/client-chime/src/ChimeClient.ts
+++ b/clients/client-chime/src/ChimeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -991,7 +992,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloud9/src/Cloud9Client.ts b/clients/client-cloud9/src/Cloud9Client.ts
index dd545e235635c..9d4c79bd38b58 100644
--- a/clients/client-cloud9/src/Cloud9Client.ts
+++ b/clients/client-cloud9/src/Cloud9Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -142,7 +143,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudcontrol/src/CloudControlClient.ts b/clients/client-cloudcontrol/src/CloudControlClient.ts
index 10c334217aa23..960e92a4b546e 100644
--- a/clients/client-cloudcontrol/src/CloudControlClient.ts
+++ b/clients/client-cloudcontrol/src/CloudControlClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -112,7 +113,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-clouddirectory/src/CloudDirectoryClient.ts b/clients/client-clouddirectory/src/CloudDirectoryClient.ts
index d975b72f998d2..bcd081670491d 100644
--- a/clients/client-clouddirectory/src/CloudDirectoryClient.ts
+++ b/clients/client-clouddirectory/src/CloudDirectoryClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -355,7 +356,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudformation/src/CloudFormationClient.ts b/clients/client-cloudformation/src/CloudFormationClient.ts
index 8de1b1077d2e8..bd3f1824c268c 100644
--- a/clients/client-cloudformation/src/CloudFormationClient.ts
+++ b/clients/client-cloudformation/src/CloudFormationClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -358,7 +359,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudfront/src/CloudFrontClient.ts b/clients/client-cloudfront/src/CloudFrontClient.ts
index fb04302b1745e..ba5242cffd34d 100644
--- a/clients/client-cloudfront/src/CloudFrontClient.ts
+++ b/clients/client-cloudfront/src/CloudFrontClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -523,7 +524,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudhsm-v2/src/CloudHSMV2Client.ts b/clients/client-cloudhsm-v2/src/CloudHSMV2Client.ts
index 7169740995748..5377e8107b320 100644
--- a/clients/client-cloudhsm-v2/src/CloudHSMV2Client.ts
+++ b/clients/client-cloudhsm-v2/src/CloudHSMV2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -127,7 +128,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudhsm/src/CloudHSMClient.ts b/clients/client-cloudhsm/src/CloudHSMClient.ts
index aa2b7d2b53d22..c94d4abfceaff 100644
--- a/clients/client-cloudhsm/src/CloudHSMClient.ts
+++ b/clients/client-cloudhsm/src/CloudHSMClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -145,7 +146,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudsearch-domain/src/CloudSearchDomainClient.ts b/clients/client-cloudsearch-domain/src/CloudSearchDomainClient.ts
index 006fd1e51d09d..5d98895bc5ff9 100644
--- a/clients/client-cloudsearch-domain/src/CloudSearchDomainClient.ts
+++ b/clients/client-cloudsearch-domain/src/CloudSearchDomainClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -82,7 +83,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudsearch/src/CloudSearchClient.ts b/clients/client-cloudsearch/src/CloudSearchClient.ts
index b2f39036b27d6..b33576a3fa9dd 100644
--- a/clients/client-cloudsearch/src/CloudSearchClient.ts
+++ b/clients/client-cloudsearch/src/CloudSearchClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -196,7 +197,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudtrail/src/CloudTrailClient.ts b/clients/client-cloudtrail/src/CloudTrailClient.ts
index ba42ac761b06a..6353df8a356fe 100644
--- a/clients/client-cloudtrail/src/CloudTrailClient.ts
+++ b/clients/client-cloudtrail/src/CloudTrailClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -187,7 +188,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudwatch-events/src/CloudWatchEventsClient.ts b/clients/client-cloudwatch-events/src/CloudWatchEventsClient.ts
index c35cbc52b7bc6..3d4258e2b2939 100644
--- a/clients/client-cloudwatch-events/src/CloudWatchEventsClient.ts
+++ b/clients/client-cloudwatch-events/src/CloudWatchEventsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -280,7 +281,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudwatch-logs/src/CloudWatchLogsClient.ts b/clients/client-cloudwatch-logs/src/CloudWatchLogsClient.ts
index f7d56ea230829..23547955d7a1a 100644
--- a/clients/client-cloudwatch-logs/src/CloudWatchLogsClient.ts
+++ b/clients/client-cloudwatch-logs/src/CloudWatchLogsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -241,7 +242,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cloudwatch/src/CloudWatchClient.ts b/clients/client-cloudwatch/src/CloudWatchClient.ts
index 1893d6304ea26..896381b9231fb 100644
--- a/clients/client-cloudwatch/src/CloudWatchClient.ts
+++ b/clients/client-cloudwatch/src/CloudWatchClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -220,7 +221,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-codeartifact/src/CodeartifactClient.ts b/clients/client-codeartifact/src/CodeartifactClient.ts
index 1ec0664ffa647..380dcd87b329a 100644
--- a/clients/client-codeartifact/src/CodeartifactClient.ts
+++ b/clients/client-codeartifact/src/CodeartifactClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -247,7 +248,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-codebuild/src/CodeBuildClient.ts b/clients/client-codebuild/src/CodeBuildClient.ts
index 9f7c44a9c861f..b064c24659b46 100644
--- a/clients/client-codebuild/src/CodeBuildClient.ts
+++ b/clients/client-codebuild/src/CodeBuildClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -259,7 +260,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-codecommit/src/CodeCommitClient.ts b/clients/client-codecommit/src/CodeCommitClient.ts
index 86f58b836cce5..c06e9ccb27b85 100644
--- a/clients/client-codecommit/src/CodeCommitClient.ts
+++ b/clients/client-codecommit/src/CodeCommitClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -454,7 +455,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-codedeploy/src/CodeDeployClient.ts b/clients/client-codedeploy/src/CodeDeployClient.ts
index b06c4e6b15ad9..a34e1396b06c0 100644
--- a/clients/client-codedeploy/src/CodeDeployClient.ts
+++ b/clients/client-codedeploy/src/CodeDeployClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -322,7 +323,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-codeguru-reviewer/src/CodeGuruReviewerClient.ts b/clients/client-codeguru-reviewer/src/CodeGuruReviewerClient.ts
index 9ce1696f8f332..5c75a3809af23 100644
--- a/clients/client-codeguru-reviewer/src/CodeGuruReviewerClient.ts
+++ b/clients/client-codeguru-reviewer/src/CodeGuruReviewerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -148,7 +149,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-codeguruprofiler/src/CodeGuruProfilerClient.ts b/clients/client-codeguruprofiler/src/CodeGuruProfilerClient.ts
index c01c8c252decf..02eee0dc30790 100644
--- a/clients/client-codeguruprofiler/src/CodeGuruProfilerClient.ts
+++ b/clients/client-codeguruprofiler/src/CodeGuruProfilerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -184,7 +185,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-codepipeline/src/CodePipelineClient.ts b/clients/client-codepipeline/src/CodePipelineClient.ts
index 3b60a126c4cf4..eebeca6cf6fad 100644
--- a/clients/client-codepipeline/src/CodePipelineClient.ts
+++ b/clients/client-codepipeline/src/CodePipelineClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -256,7 +257,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-codestar-connections/src/CodeStarConnectionsClient.ts b/clients/client-codestar-connections/src/CodeStarConnectionsClient.ts
index b4b2bc41bbf0e..ad08f21f7cdca 100644
--- a/clients/client-codestar-connections/src/CodeStarConnectionsClient.ts
+++ b/clients/client-codestar-connections/src/CodeStarConnectionsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -118,7 +119,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-codestar-notifications/src/CodestarNotificationsClient.ts b/clients/client-codestar-notifications/src/CodestarNotificationsClient.ts
index ab9bc2c00ba41..895399cf86c80 100644
--- a/clients/client-codestar-notifications/src/CodestarNotificationsClient.ts
+++ b/clients/client-codestar-notifications/src/CodestarNotificationsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -136,7 +137,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-codestar/src/CodeStarClient.ts b/clients/client-codestar/src/CodeStarClient.ts
index 4368555c89329..fda6c82a35ad8 100644
--- a/clients/client-codestar/src/CodeStarClient.ts
+++ b/clients/client-codestar/src/CodeStarClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -142,7 +143,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cognito-identity-provider/src/CognitoIdentityProviderClient.ts b/clients/client-cognito-identity-provider/src/CognitoIdentityProviderClient.ts
index ac570ad08bcff..648e8e6fce310 100644
--- a/clients/client-cognito-identity-provider/src/CognitoIdentityProviderClient.ts
+++ b/clients/client-cognito-identity-provider/src/CognitoIdentityProviderClient.ts
@@ -30,6 +30,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -545,7 +546,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cognito-identity/src/CognitoIdentityClient.ts b/clients/client-cognito-identity/src/CognitoIdentityClient.ts
index cc69853197be3..d6932b4840e62 100644
--- a/clients/client-cognito-identity/src/CognitoIdentityClient.ts
+++ b/clients/client-cognito-identity/src/CognitoIdentityClient.ts
@@ -30,6 +30,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -176,7 +177,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cognito-sync/src/CognitoSyncClient.ts b/clients/client-cognito-sync/src/CognitoSyncClient.ts
index c32741c21198c..e560a20a37d40 100644
--- a/clients/client-cognito-sync/src/CognitoSyncClient.ts
+++ b/clients/client-cognito-sync/src/CognitoSyncClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -151,7 +152,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-comprehend/src/ComprehendClient.ts b/clients/client-comprehend/src/ComprehendClient.ts
index 46d8ca4db2c8f..989fb74a85404 100644
--- a/clients/client-comprehend/src/ComprehendClient.ts
+++ b/clients/client-comprehend/src/ComprehendClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -433,7 +434,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-comprehendmedical/src/ComprehendMedicalClient.ts b/clients/client-comprehendmedical/src/ComprehendMedicalClient.ts
index 8538d26e8243f..5afb5ea0accea 100644
--- a/clients/client-comprehendmedical/src/ComprehendMedicalClient.ts
+++ b/clients/client-comprehendmedical/src/ComprehendMedicalClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -217,7 +218,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-compute-optimizer/src/ComputeOptimizerClient.ts b/clients/client-compute-optimizer/src/ComputeOptimizerClient.ts
index b9defc1bda5a4..35c319d2a800e 100644
--- a/clients/client-compute-optimizer/src/ComputeOptimizerClient.ts
+++ b/clients/client-compute-optimizer/src/ComputeOptimizerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -187,7 +188,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-config-service/src/ConfigServiceClient.ts b/clients/client-config-service/src/ConfigServiceClient.ts
index 6605a76866449..e1ab27c97ef66 100644
--- a/clients/client-config-service/src/ConfigServiceClient.ts
+++ b/clients/client-config-service/src/ConfigServiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -559,7 +560,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-connect-contact-lens/src/ConnectContactLensClient.ts b/clients/client-connect-contact-lens/src/ConnectContactLensClient.ts
index 3c02dced6db75..532290e2f1905 100644
--- a/clients/client-connect-contact-lens/src/ConnectContactLensClient.ts
+++ b/clients/client-connect-contact-lens/src/ConnectContactLensClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -83,7 +84,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-connect/src/ConnectClient.ts b/clients/client-connect/src/ConnectClient.ts
index fb72a42f1187f..791d5440a1dfd 100644
--- a/clients/client-connect/src/ConnectClient.ts
+++ b/clients/client-connect/src/ConnectClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -742,7 +743,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-connectparticipant/src/ConnectParticipantClient.ts b/clients/client-connectparticipant/src/ConnectParticipantClient.ts
index ea2d43f962a03..d4c3e35a01274 100644
--- a/clients/client-connectparticipant/src/ConnectParticipantClient.ts
+++ b/clients/client-connectparticipant/src/ConnectParticipantClient.ts
@@ -41,6 +41,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -121,7 +122,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cost-and-usage-report-service/src/CostAndUsageReportServiceClient.ts b/clients/client-cost-and-usage-report-service/src/CostAndUsageReportServiceClient.ts
index 536c1c5a53916..f27478b94bd58 100644
--- a/clients/client-cost-and-usage-report-service/src/CostAndUsageReportServiceClient.ts
+++ b/clients/client-cost-and-usage-report-service/src/CostAndUsageReportServiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -103,7 +104,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-cost-explorer/src/CostExplorerClient.ts b/clients/client-cost-explorer/src/CostExplorerClient.ts
index 7084ca9732674..8d51c051bc7ab 100644
--- a/clients/client-cost-explorer/src/CostExplorerClient.ts
+++ b/clients/client-cost-explorer/src/CostExplorerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -235,7 +236,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-customer-profiles/src/CustomerProfilesClient.ts b/clients/client-customer-profiles/src/CustomerProfilesClient.ts
index bdfec86d96d94..6c8431f4d566a 100644
--- a/clients/client-customer-profiles/src/CustomerProfilesClient.ts
+++ b/clients/client-customer-profiles/src/CustomerProfilesClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -232,7 +233,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-data-pipeline/src/DataPipelineClient.ts b/clients/client-data-pipeline/src/DataPipelineClient.ts
index 9616a20955c9a..6ce6b05bae61c 100644
--- a/clients/client-data-pipeline/src/DataPipelineClient.ts
+++ b/clients/client-data-pipeline/src/DataPipelineClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -148,7 +149,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-database-migration-service/src/DatabaseMigrationServiceClient.ts b/clients/client-database-migration-service/src/DatabaseMigrationServiceClient.ts
index 72ea1fd46691a..7355ec60a4f65 100644
--- a/clients/client-database-migration-service/src/DatabaseMigrationServiceClient.ts
+++ b/clients/client-database-migration-service/src/DatabaseMigrationServiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -370,7 +371,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-databrew/src/DataBrewClient.ts b/clients/client-databrew/src/DataBrewClient.ts
index 5bb4a09f51968..3bd97c80654c4 100644
--- a/clients/client-databrew/src/DataBrewClient.ts
+++ b/clients/client-databrew/src/DataBrewClient.ts
@@ -41,6 +41,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -232,7 +233,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-dataexchange/src/DataExchangeClient.ts b/clients/client-dataexchange/src/DataExchangeClient.ts
index 39d28bad28b4d..9fdef3fb79407 100644
--- a/clients/client-dataexchange/src/DataExchangeClient.ts
+++ b/clients/client-dataexchange/src/DataExchangeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -169,7 +170,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-datasync/src/DataSyncClient.ts b/clients/client-datasync/src/DataSyncClient.ts
index ad952bf24c04d..9f974eb964292 100644
--- a/clients/client-datasync/src/DataSyncClient.ts
+++ b/clients/client-datasync/src/DataSyncClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -244,7 +245,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-dax/src/DAXClient.ts b/clients/client-dax/src/DAXClient.ts
index 5777b0096e2b6..2ae2e63884c71 100644
--- a/clients/client-dax/src/DAXClient.ts
+++ b/clients/client-dax/src/DAXClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -166,7 +167,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-detective/src/DetectiveClient.ts b/clients/client-detective/src/DetectiveClient.ts
index 64d1e59424107..bce25264e4900 100644
--- a/clients/client-detective/src/DetectiveClient.ts
+++ b/clients/client-detective/src/DetectiveClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -163,7 +164,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-device-farm/src/DeviceFarmClient.ts b/clients/client-device-farm/src/DeviceFarmClient.ts
index 3fb48b508e25f..12e5afcef781e 100644
--- a/clients/client-device-farm/src/DeviceFarmClient.ts
+++ b/clients/client-device-farm/src/DeviceFarmClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -406,7 +407,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-devops-guru/src/DevOpsGuruClient.ts b/clients/client-devops-guru/src/DevOpsGuruClient.ts
index 92c6be8bbfbde..0984359cfc811 100644
--- a/clients/client-devops-guru/src/DevOpsGuruClient.ts
+++ b/clients/client-devops-guru/src/DevOpsGuruClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -211,7 +212,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-direct-connect/src/DirectConnectClient.ts b/clients/client-direct-connect/src/DirectConnectClient.ts
index f3caa41342eef..f008d752c8961 100644
--- a/clients/client-direct-connect/src/DirectConnectClient.ts
+++ b/clients/client-direct-connect/src/DirectConnectClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -403,7 +404,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-directory-service/src/DirectoryServiceClient.ts b/clients/client-directory-service/src/DirectoryServiceClient.ts
index 427d97be3d9b2..c73a4d672086b 100644
--- a/clients/client-directory-service/src/DirectoryServiceClient.ts
+++ b/clients/client-directory-service/src/DirectoryServiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -352,7 +353,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-dlm/src/DLMClient.ts b/clients/client-dlm/src/DLMClient.ts
index a17790252024a..41400517bb17e 100644
--- a/clients/client-dlm/src/DLMClient.ts
+++ b/clients/client-dlm/src/DLMClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -118,7 +119,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-docdb/src/DocDBClient.ts b/clients/client-docdb/src/DocDBClient.ts
index 63933ca0c4782..bdb769b30b208 100644
--- a/clients/client-docdb/src/DocDBClient.ts
+++ b/clients/client-docdb/src/DocDBClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -358,7 +359,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-drs/src/DrsClient.ts b/clients/client-drs/src/DrsClient.ts
index 1ed46f67268e5..4eb54d1868ab4 100644
--- a/clients/client-drs/src/DrsClient.ts
+++ b/clients/client-drs/src/DrsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -229,7 +230,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-dynamodb-streams/src/DynamoDBStreamsClient.ts b/clients/client-dynamodb-streams/src/DynamoDBStreamsClient.ts
index bdabcae4060f5..044362d26d74e 100644
--- a/clients/client-dynamodb-streams/src/DynamoDBStreamsClient.ts
+++ b/clients/client-dynamodb-streams/src/DynamoDBStreamsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -91,7 +92,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-dynamodb/src/DynamoDBClient.ts b/clients/client-dynamodb/src/DynamoDBClient.ts
index e2fe31cab40ae..a3241382b9e76 100644
--- a/clients/client-dynamodb/src/DynamoDBClient.ts
+++ b/clients/client-dynamodb/src/DynamoDBClient.ts
@@ -40,6 +40,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -289,7 +290,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ebs/src/EBSClient.ts b/clients/client-ebs/src/EBSClient.ts
index e56537346cf2b..c765f57eab46f 100644
--- a/clients/client-ebs/src/EBSClient.ts
+++ b/clients/client-ebs/src/EBSClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -97,7 +98,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ec2-instance-connect/src/EC2InstanceConnectClient.ts b/clients/client-ec2-instance-connect/src/EC2InstanceConnectClient.ts
index f8ac706b8c332..e4be1aebf5db3 100644
--- a/clients/client-ec2-instance-connect/src/EC2InstanceConnectClient.ts
+++ b/clients/client-ec2-instance-connect/src/EC2InstanceConnectClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -84,7 +85,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ec2/src/EC2Client.ts b/clients/client-ec2/src/EC2Client.ts
index 10b6cc22aa906..bfdab08db6620 100644
--- a/clients/client-ec2/src/EC2Client.ts
+++ b/clients/client-ec2/src/EC2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -2854,7 +2855,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ecr-public/src/ECRPUBLICClient.ts b/clients/client-ecr-public/src/ECRPUBLICClient.ts
index 2dec7968c1311..415c06fcac678 100644
--- a/clients/client-ecr-public/src/ECRPUBLICClient.ts
+++ b/clients/client-ecr-public/src/ECRPUBLICClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -187,7 +188,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ecr/src/ECRClient.ts b/clients/client-ecr/src/ECRClient.ts
index 02c5404d4bd3a..b5c9d1dc830d7 100644
--- a/clients/client-ecr/src/ECRClient.ts
+++ b/clients/client-ecr/src/ECRClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -277,7 +278,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ecs/src/ECSClient.ts b/clients/client-ecs/src/ECSClient.ts
index 8e0f010392c14..72125f203b675 100644
--- a/clients/client-ecs/src/ECSClient.ts
+++ b/clients/client-ecs/src/ECSClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -313,7 +314,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-efs/src/EFSClient.ts b/clients/client-efs/src/EFSClient.ts
index 1cdf0d06ebd04..112f68390591d 100644
--- a/clients/client-efs/src/EFSClient.ts
+++ b/clients/client-efs/src/EFSClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -220,7 +221,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-eks/src/EKSClient.ts b/clients/client-eks/src/EKSClient.ts
index 392b02771ebae..6676b14ff69f2 100644
--- a/clients/client-eks/src/EKSClient.ts
+++ b/clients/client-eks/src/EKSClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -226,7 +227,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-elastic-beanstalk/src/ElasticBeanstalkClient.ts b/clients/client-elastic-beanstalk/src/ElasticBeanstalkClient.ts
index a8e332a9ae2e1..51bfd8acda0da 100644
--- a/clients/client-elastic-beanstalk/src/ElasticBeanstalkClient.ts
+++ b/clients/client-elastic-beanstalk/src/ElasticBeanstalkClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -337,7 +338,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-elastic-inference/src/ElasticInferenceClient.ts b/clients/client-elastic-inference/src/ElasticInferenceClient.ts
index 216c07701e334..80a80b932df50 100644
--- a/clients/client-elastic-inference/src/ElasticInferenceClient.ts
+++ b/clients/client-elastic-inference/src/ElasticInferenceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -109,7 +110,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2Client.ts b/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2Client.ts
index aa499256e91cf..cf2d553224cb7 100644
--- a/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2Client.ts
+++ b/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -217,7 +218,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-elastic-load-balancing/src/ElasticLoadBalancingClient.ts b/clients/client-elastic-load-balancing/src/ElasticLoadBalancingClient.ts
index 2e4997bd8a906..713f63c3b619b 100644
--- a/clients/client-elastic-load-balancing/src/ElasticLoadBalancingClient.ts
+++ b/clients/client-elastic-load-balancing/src/ElasticLoadBalancingClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -238,7 +239,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-elastic-transcoder/src/ElasticTranscoderClient.ts b/clients/client-elastic-transcoder/src/ElasticTranscoderClient.ts
index d6af85c246d61..8ff227a414a9c 100644
--- a/clients/client-elastic-transcoder/src/ElasticTranscoderClient.ts
+++ b/clients/client-elastic-transcoder/src/ElasticTranscoderClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -136,7 +137,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-elasticache/src/ElastiCacheClient.ts b/clients/client-elasticache/src/ElastiCacheClient.ts
index 674fa6f7683ee..81662c747a0ca 100644
--- a/clients/client-elasticache/src/ElastiCacheClient.ts
+++ b/clients/client-elasticache/src/ElastiCacheClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -406,7 +407,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-elasticsearch-service/src/ElasticsearchServiceClient.ts b/clients/client-elasticsearch-service/src/ElasticsearchServiceClient.ts
index 19e5f9cac75f4..fcd159bdd1e49 100644
--- a/clients/client-elasticsearch-service/src/ElasticsearchServiceClient.ts
+++ b/clients/client-elasticsearch-service/src/ElasticsearchServiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -289,7 +290,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-emr-containers/src/EMRContainersClient.ts b/clients/client-emr-containers/src/EMRContainersClient.ts
index 45955ed68d88d..a3f31257141d9 100644
--- a/clients/client-emr-containers/src/EMRContainersClient.ts
+++ b/clients/client-emr-containers/src/EMRContainersClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -151,7 +152,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-emr/src/EMRClient.ts b/clients/client-emr/src/EMRClient.ts
index 7b3e481a7ae10..cce8013db91cd 100644
--- a/clients/client-emr/src/EMRClient.ts
+++ b/clients/client-emr/src/EMRClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -322,7 +323,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-eventbridge/src/EventBridgeClient.ts b/clients/client-eventbridge/src/EventBridgeClient.ts
index f90e689ecee09..696995d134ff0 100644
--- a/clients/client-eventbridge/src/EventBridgeClient.ts
+++ b/clients/client-eventbridge/src/EventBridgeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -280,7 +281,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-evidently/src/EvidentlyClient.ts b/clients/client-evidently/src/EvidentlyClient.ts
index 81613c61e68ea..b7c1b0bf0947d 100644
--- a/clients/client-evidently/src/EvidentlyClient.ts
+++ b/clients/client-evidently/src/EvidentlyClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -187,7 +188,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-finspace-data/src/FinspaceDataClient.ts b/clients/client-finspace-data/src/FinspaceDataClient.ts
index e855c5db09426..99b7fa077f059 100644
--- a/clients/client-finspace-data/src/FinspaceDataClient.ts
+++ b/clients/client-finspace-data/src/FinspaceDataClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -124,7 +125,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-finspace/src/FinspaceClient.ts b/clients/client-finspace/src/FinspaceClient.ts
index 8a97e925d8eba..cb68413084cd9 100644
--- a/clients/client-finspace/src/FinspaceClient.ts
+++ b/clients/client-finspace/src/FinspaceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -106,7 +107,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-firehose/src/FirehoseClient.ts b/clients/client-firehose/src/FirehoseClient.ts
index 272d8ff707771..2a8dc45f97917 100644
--- a/clients/client-firehose/src/FirehoseClient.ts
+++ b/clients/client-firehose/src/FirehoseClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -139,7 +140,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-fis/src/FisClient.ts b/clients/client-fis/src/FisClient.ts
index ec360623edfb8..cc0ba8c15a776 100644
--- a/clients/client-fis/src/FisClient.ts
+++ b/clients/client-fis/src/FisClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -151,7 +152,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-fms/src/FMSClient.ts b/clients/client-fms/src/FMSClient.ts
index dcb783de3f5c2..bc82b3c8c757c 100644
--- a/clients/client-fms/src/FMSClient.ts
+++ b/clients/client-fms/src/FMSClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -190,7 +191,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-forecast/src/ForecastClient.ts b/clients/client-forecast/src/ForecastClient.ts
index dc13f7670968a..ba7a045574a75 100644
--- a/clients/client-forecast/src/ForecastClient.ts
+++ b/clients/client-forecast/src/ForecastClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -286,7 +287,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-forecastquery/src/ForecastqueryClient.ts b/clients/client-forecastquery/src/ForecastqueryClient.ts
index 9fa7281ec41a9..21387214de7be 100644
--- a/clients/client-forecastquery/src/ForecastqueryClient.ts
+++ b/clients/client-forecastquery/src/ForecastqueryClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -80,7 +81,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-frauddetector/src/FraudDetectorClient.ts b/clients/client-frauddetector/src/FraudDetectorClient.ts
index 530bf2ffd9ef8..d797e8faa9503 100644
--- a/clients/client-frauddetector/src/FraudDetectorClient.ts
+++ b/clients/client-frauddetector/src/FraudDetectorClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -352,7 +353,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-fsx/src/FSxClient.ts b/clients/client-fsx/src/FSxClient.ts
index 85ea248043290..5c7feb1740ddc 100644
--- a/clients/client-fsx/src/FSxClient.ts
+++ b/clients/client-fsx/src/FSxClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -250,7 +251,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-gamelift/src/GameLiftClient.ts b/clients/client-gamelift/src/GameLiftClient.ts
index fe5d376124069..586d86231749f 100644
--- a/clients/client-gamelift/src/GameLiftClient.ts
+++ b/clients/client-gamelift/src/GameLiftClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -535,7 +536,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-glacier/src/GlacierClient.ts b/clients/client-glacier/src/GlacierClient.ts
index 5e69a6a8fd327..e95bfb7c5b006 100644
--- a/clients/client-glacier/src/GlacierClient.ts
+++ b/clients/client-glacier/src/GlacierClient.ts
@@ -36,6 +36,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -228,7 +229,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-global-accelerator/src/GlobalAcceleratorClient.ts b/clients/client-global-accelerator/src/GlobalAcceleratorClient.ts
index 4a9ecd5985828..d739306f9479d 100644
--- a/clients/client-global-accelerator/src/GlobalAcceleratorClient.ts
+++ b/clients/client-global-accelerator/src/GlobalAcceleratorClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -313,7 +314,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-glue/src/GlueClient.ts b/clients/client-glue/src/GlueClient.ts
index bef556db9b25f..9f7a8db4f5c6a 100644
--- a/clients/client-glue/src/GlueClient.ts
+++ b/clients/client-glue/src/GlueClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -736,7 +737,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-grafana/src/GrafanaClient.ts b/clients/client-grafana/src/GrafanaClient.ts
index 3afbe5525abad..85e7a97891166 100644
--- a/clients/client-grafana/src/GrafanaClient.ts
+++ b/clients/client-grafana/src/GrafanaClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -121,7 +122,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-greengrass/src/GreengrassClient.ts b/clients/client-greengrass/src/GreengrassClient.ts
index 213d4d88edae6..16944ffc3101b 100644
--- a/clients/client-greengrass/src/GreengrassClient.ts
+++ b/clients/client-greengrass/src/GreengrassClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -583,7 +584,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-greengrassv2/src/GreengrassV2Client.ts b/clients/client-greengrassv2/src/GreengrassV2Client.ts
index cd7344d551e28..d93734d3ce853 100644
--- a/clients/client-greengrassv2/src/GreengrassV2Client.ts
+++ b/clients/client-greengrassv2/src/GreengrassV2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -208,7 +209,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-groundstation/src/GroundStationClient.ts b/clients/client-groundstation/src/GroundStationClient.ts
index b5716c6c7d8ff..6450185f08444 100644
--- a/clients/client-groundstation/src/GroundStationClient.ts
+++ b/clients/client-groundstation/src/GroundStationClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -181,7 +182,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-guardduty/src/GuardDutyClient.ts b/clients/client-guardduty/src/GuardDutyClient.ts
index 75464c596fc6d..96c37bb09df1a 100644
--- a/clients/client-guardduty/src/GuardDutyClient.ts
+++ b/clients/client-guardduty/src/GuardDutyClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -325,7 +326,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-health/src/HealthClient.ts b/clients/client-health/src/HealthClient.ts
index afc3bf60c09d5..adf321009a41b 100644
--- a/clients/client-health/src/HealthClient.ts
+++ b/clients/client-health/src/HealthClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -151,7 +152,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-healthlake/src/HealthLakeClient.ts b/clients/client-healthlake/src/HealthLakeClient.ts
index 59ee7d1c3048d..1f75e2a0f5878 100644
--- a/clients/client-healthlake/src/HealthLakeClient.ts
+++ b/clients/client-healthlake/src/HealthLakeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -136,7 +137,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-honeycode/src/HoneycodeClient.ts b/clients/client-honeycode/src/HoneycodeClient.ts
index 5f513c4aa354b..68359a5fb9560 100644
--- a/clients/client-honeycode/src/HoneycodeClient.ts
+++ b/clients/client-honeycode/src/HoneycodeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -148,7 +149,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iam/src/IAMClient.ts b/clients/client-iam/src/IAMClient.ts
index 3144d141fb19d..c440475939229 100644
--- a/clients/client-iam/src/IAMClient.ts
+++ b/clients/client-iam/src/IAMClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -778,7 +779,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-identitystore/src/IdentitystoreClient.ts b/clients/client-identitystore/src/IdentitystoreClient.ts
index d9df0a9802c7c..cbe1697ba9828 100644
--- a/clients/client-identitystore/src/IdentitystoreClient.ts
+++ b/clients/client-identitystore/src/IdentitystoreClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -91,7 +92,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-imagebuilder/src/ImagebuilderClient.ts b/clients/client-imagebuilder/src/ImagebuilderClient.ts
index 18aa6ea97b06f..7d445de30acc7 100644
--- a/clients/client-imagebuilder/src/ImagebuilderClient.ts
+++ b/clients/client-imagebuilder/src/ImagebuilderClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -307,7 +308,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-inspector/src/InspectorClient.ts b/clients/client-inspector/src/InspectorClient.ts
index ffcfbc2f1c048..2a2d07fa1639c 100644
--- a/clients/client-inspector/src/InspectorClient.ts
+++ b/clients/client-inspector/src/InspectorClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -268,7 +269,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-inspector2/src/Inspector2Client.ts b/clients/client-inspector2/src/Inspector2Client.ts
index 56c01d290be59..810679e2bbd41 100644
--- a/clients/client-inspector2/src/Inspector2Client.ts
+++ b/clients/client-inspector2/src/Inspector2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -214,7 +215,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iot-1click-devices-service/src/IoT1ClickDevicesServiceClient.ts b/clients/client-iot-1click-devices-service/src/IoT1ClickDevicesServiceClient.ts
index 4fe9b8ecbc60b..1ab521c5136d9 100644
--- a/clients/client-iot-1click-devices-service/src/IoT1ClickDevicesServiceClient.ts
+++ b/clients/client-iot-1click-devices-service/src/IoT1ClickDevicesServiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -130,7 +131,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iot-1click-projects/src/IoT1ClickProjectsClient.ts b/clients/client-iot-1click-projects/src/IoT1ClickProjectsClient.ts
index adbcdb945f824..3500c66cd137c 100644
--- a/clients/client-iot-1click-projects/src/IoT1ClickProjectsClient.ts
+++ b/clients/client-iot-1click-projects/src/IoT1ClickProjectsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -139,7 +140,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iot-data-plane/src/IoTDataPlaneClient.ts b/clients/client-iot-data-plane/src/IoTDataPlaneClient.ts
index 3190d21c0191f..b80fdaf3fca19 100644
--- a/clients/client-iot-data-plane/src/IoTDataPlaneClient.ts
+++ b/clients/client-iot-data-plane/src/IoTDataPlaneClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -106,7 +107,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iot-events-data/src/IoTEventsDataClient.ts b/clients/client-iot-events-data/src/IoTEventsDataClient.ts
index bff39be91f13a..7d2a5d9ca839c 100644
--- a/clients/client-iot-events-data/src/IoTEventsDataClient.ts
+++ b/clients/client-iot-events-data/src/IoTEventsDataClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -118,7 +119,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iot-events/src/IoTEventsClient.ts b/clients/client-iot-events/src/IoTEventsClient.ts
index 99ae417a8b4be..de556dd6bea2a 100644
--- a/clients/client-iot-events/src/IoTEventsClient.ts
+++ b/clients/client-iot-events/src/IoTEventsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -190,7 +191,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iot-jobs-data-plane/src/IoTJobsDataPlaneClient.ts b/clients/client-iot-jobs-data-plane/src/IoTJobsDataPlaneClient.ts
index e6a27e2605602..72edb42c5ee91 100644
--- a/clients/client-iot-jobs-data-plane/src/IoTJobsDataPlaneClient.ts
+++ b/clients/client-iot-jobs-data-plane/src/IoTJobsDataPlaneClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -100,7 +101,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iot-wireless/src/IoTWirelessClient.ts b/clients/client-iot-wireless/src/IoTWirelessClient.ts
index 5797275979490..22ba791b85d0c 100644
--- a/clients/client-iot-wireless/src/IoTWirelessClient.ts
+++ b/clients/client-iot-wireless/src/IoTWirelessClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -532,7 +533,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iot/src/IoTClient.ts b/clients/client-iot/src/IoTClient.ts
index 388c41870265a..7961da98483ac 100644
--- a/clients/client-iot/src/IoTClient.ts
+++ b/clients/client-iot/src/IoTClient.ts
@@ -41,6 +41,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -1201,7 +1202,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iotanalytics/src/IoTAnalyticsClient.ts b/clients/client-iotanalytics/src/IoTAnalyticsClient.ts
index abe09894d1ed0..07fa00ab8ce99 100644
--- a/clients/client-iotanalytics/src/IoTAnalyticsClient.ts
+++ b/clients/client-iotanalytics/src/IoTAnalyticsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -205,7 +206,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iotdeviceadvisor/src/IotDeviceAdvisorClient.ts b/clients/client-iotdeviceadvisor/src/IotDeviceAdvisorClient.ts
index 0c0f31cec6c16..fb3e00d3f7bdb 100644
--- a/clients/client-iotdeviceadvisor/src/IotDeviceAdvisorClient.ts
+++ b/clients/client-iotdeviceadvisor/src/IotDeviceAdvisorClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -136,7 +137,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iotfleethub/src/IoTFleetHubClient.ts b/clients/client-iotfleethub/src/IoTFleetHubClient.ts
index f25aff42eee4a..d31873ec26ad1 100644
--- a/clients/client-iotfleethub/src/IoTFleetHubClient.ts
+++ b/clients/client-iotfleethub/src/IoTFleetHubClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -109,7 +110,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iotsecuretunneling/src/IoTSecureTunnelingClient.ts b/clients/client-iotsecuretunneling/src/IoTSecureTunnelingClient.ts
index 13ffdd11965cc..ff10a6c7ed484 100644
--- a/clients/client-iotsecuretunneling/src/IoTSecureTunnelingClient.ts
+++ b/clients/client-iotsecuretunneling/src/IoTSecureTunnelingClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -103,7 +104,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iotsitewise/src/IoTSiteWiseClient.ts b/clients/client-iotsitewise/src/IoTSiteWiseClient.ts
index eae55b2438490..04da8ed960178 100644
--- a/clients/client-iotsitewise/src/IoTSiteWiseClient.ts
+++ b/clients/client-iotsitewise/src/IoTSiteWiseClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -340,7 +341,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iotthingsgraph/src/IoTThingsGraphClient.ts b/clients/client-iotthingsgraph/src/IoTThingsGraphClient.ts
index 5859f1c0e8bbd..d058bf3b130cf 100644
--- a/clients/client-iotthingsgraph/src/IoTThingsGraphClient.ts
+++ b/clients/client-iotthingsgraph/src/IoTThingsGraphClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -247,7 +248,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-iottwinmaker/src/IoTTwinMakerClient.ts b/clients/client-iottwinmaker/src/IoTTwinMakerClient.ts
index 6fb6ade50669c..760c8874bb168 100644
--- a/clients/client-iottwinmaker/src/IoTTwinMakerClient.ts
+++ b/clients/client-iottwinmaker/src/IoTTwinMakerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -175,7 +176,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ivs/src/IvsClient.ts b/clients/client-ivs/src/IvsClient.ts
index f443bcafed914..8056e8e849e79 100644
--- a/clients/client-ivs/src/IvsClient.ts
+++ b/clients/client-ivs/src/IvsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -187,7 +188,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kafka/src/KafkaClient.ts b/clients/client-kafka/src/KafkaClient.ts
index 6f49daf622455..c0f63d42ec61e 100644
--- a/clients/client-kafka/src/KafkaClient.ts
+++ b/clients/client-kafka/src/KafkaClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -232,7 +233,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kafkaconnect/src/KafkaConnectClient.ts b/clients/client-kafkaconnect/src/KafkaConnectClient.ts
index 8a0332055fdf3..7e20139e1440f 100644
--- a/clients/client-kafkaconnect/src/KafkaConnectClient.ts
+++ b/clients/client-kafkaconnect/src/KafkaConnectClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -124,7 +125,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kendra/src/KendraClient.ts b/clients/client-kendra/src/KendraClient.ts
index de2538aabe918..ec252dab8fe67 100644
--- a/clients/client-kendra/src/KendraClient.ts
+++ b/clients/client-kendra/src/KendraClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -316,7 +317,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kinesis-analytics-v2/src/KinesisAnalyticsV2Client.ts b/clients/client-kinesis-analytics-v2/src/KinesisAnalyticsV2Client.ts
index fdab77b8bc2a2..bd09acf73987b 100644
--- a/clients/client-kinesis-analytics-v2/src/KinesisAnalyticsV2Client.ts
+++ b/clients/client-kinesis-analytics-v2/src/KinesisAnalyticsV2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -241,7 +242,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kinesis-analytics/src/KinesisAnalyticsClient.ts b/clients/client-kinesis-analytics/src/KinesisAnalyticsClient.ts
index 8dd77237510be..a42e5b1f5116e 100644
--- a/clients/client-kinesis-analytics/src/KinesisAnalyticsClient.ts
+++ b/clients/client-kinesis-analytics/src/KinesisAnalyticsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -175,7 +176,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kinesis-video-archived-media/src/KinesisVideoArchivedMediaClient.ts b/clients/client-kinesis-video-archived-media/src/KinesisVideoArchivedMediaClient.ts
index 5e5dd72a8f44f..99aeb782fd273 100644
--- a/clients/client-kinesis-video-archived-media/src/KinesisVideoArchivedMediaClient.ts
+++ b/clients/client-kinesis-video-archived-media/src/KinesisVideoArchivedMediaClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -103,7 +104,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kinesis-video-media/src/KinesisVideoMediaClient.ts b/clients/client-kinesis-video-media/src/KinesisVideoMediaClient.ts
index 53a094a166d30..6008ffde5c014 100644
--- a/clients/client-kinesis-video-media/src/KinesisVideoMediaClient.ts
+++ b/clients/client-kinesis-video-media/src/KinesisVideoMediaClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -80,7 +81,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kinesis-video-signaling/src/KinesisVideoSignalingClient.ts b/clients/client-kinesis-video-signaling/src/KinesisVideoSignalingClient.ts
index 940bc9688ecfc..52233d4fce412 100644
--- a/clients/client-kinesis-video-signaling/src/KinesisVideoSignalingClient.ts
+++ b/clients/client-kinesis-video-signaling/src/KinesisVideoSignalingClient.ts
@@ -41,6 +41,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -90,7 +91,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kinesis-video/src/KinesisVideoClient.ts b/clients/client-kinesis-video/src/KinesisVideoClient.ts
index 9f94403dcaca3..b375e355fdf93 100644
--- a/clients/client-kinesis-video/src/KinesisVideoClient.ts
+++ b/clients/client-kinesis-video/src/KinesisVideoClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -160,7 +161,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kinesis/src/KinesisClient.ts b/clients/client-kinesis/src/KinesisClient.ts
index 81b102b0a2d2c..3bb1394932559 100644
--- a/clients/client-kinesis/src/KinesisClient.ts
+++ b/clients/client-kinesis/src/KinesisClient.ts
@@ -40,6 +40,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -208,7 +209,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-kms/src/KMSClient.ts b/clients/client-kms/src/KMSClient.ts
index b53e45fe68520..7d829bb2ea480 100644
--- a/clients/client-kms/src/KMSClient.ts
+++ b/clients/client-kms/src/KMSClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -271,7 +272,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-lakeformation/src/LakeFormationClient.ts b/clients/client-lakeformation/src/LakeFormationClient.ts
index 5ea549292a66b..d00d418c2562c 100644
--- a/clients/client-lakeformation/src/LakeFormationClient.ts
+++ b/clients/client-lakeformation/src/LakeFormationClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -265,7 +266,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-lambda/src/LambdaClient.ts b/clients/client-lambda/src/LambdaClient.ts
index d36efb1aa34d7..3b33bcacffaf2 100644
--- a/clients/client-lambda/src/LambdaClient.ts
+++ b/clients/client-lambda/src/LambdaClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -355,7 +356,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-lex-model-building-service/src/LexModelBuildingServiceClient.ts b/clients/client-lex-model-building-service/src/LexModelBuildingServiceClient.ts
index 1cd69b2aba6ce..863af8c251a07 100644
--- a/clients/client-lex-model-building-service/src/LexModelBuildingServiceClient.ts
+++ b/clients/client-lex-model-building-service/src/LexModelBuildingServiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -235,7 +236,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-lex-models-v2/src/LexModelsV2Client.ts b/clients/client-lex-models-v2/src/LexModelsV2Client.ts
index 9609ec6c60811..515c32f961aca 100644
--- a/clients/client-lex-models-v2/src/LexModelsV2Client.ts
+++ b/clients/client-lex-models-v2/src/LexModelsV2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -328,7 +329,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-lex-runtime-service/src/LexRuntimeServiceClient.ts b/clients/client-lex-runtime-service/src/LexRuntimeServiceClient.ts
index 0df619c8cfc50..28022abf9c0db 100644
--- a/clients/client-lex-runtime-service/src/LexRuntimeServiceClient.ts
+++ b/clients/client-lex-runtime-service/src/LexRuntimeServiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -94,7 +95,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-lex-runtime-v2/src/LexRuntimeV2Client.ts b/clients/client-lex-runtime-v2/src/LexRuntimeV2Client.ts
index 8bb8df6d0f198..3788aa6053c7d 100644
--- a/clients/client-lex-runtime-v2/src/LexRuntimeV2Client.ts
+++ b/clients/client-lex-runtime-v2/src/LexRuntimeV2Client.ts
@@ -45,6 +45,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -109,7 +110,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-license-manager/src/LicenseManagerClient.ts b/clients/client-license-manager/src/LicenseManagerClient.ts
index 7c38175a0cab0..74018f36eec67 100644
--- a/clients/client-license-manager/src/LicenseManagerClient.ts
+++ b/clients/client-license-manager/src/LicenseManagerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -304,7 +305,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-lightsail/src/LightsailClient.ts b/clients/client-lightsail/src/LightsailClient.ts
index 73b59a26275fe..6388347347b34 100644
--- a/clients/client-lightsail/src/LightsailClient.ts
+++ b/clients/client-lightsail/src/LightsailClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -763,7 +764,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-location/src/LocationClient.ts b/clients/client-location/src/LocationClient.ts
index 60f1d0aefefa9..385e2d878ed2f 100644
--- a/clients/client-location/src/LocationClient.ts
+++ b/clients/client-location/src/LocationClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -313,7 +314,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-lookoutequipment/src/LookoutEquipmentClient.ts b/clients/client-lookoutequipment/src/LookoutEquipmentClient.ts
index bc7ce5805e6fa..33cbdeab6d698 100644
--- a/clients/client-lookoutequipment/src/LookoutEquipmentClient.ts
+++ b/clients/client-lookoutequipment/src/LookoutEquipmentClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -181,7 +182,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-lookoutmetrics/src/LookoutMetricsClient.ts b/clients/client-lookoutmetrics/src/LookoutMetricsClient.ts
index da7374ea51040..d53818c773abe 100644
--- a/clients/client-lookoutmetrics/src/LookoutMetricsClient.ts
+++ b/clients/client-lookoutmetrics/src/LookoutMetricsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -199,7 +200,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-lookoutvision/src/LookoutVisionClient.ts b/clients/client-lookoutvision/src/LookoutVisionClient.ts
index d275a413ee3c8..5184d34018fa8 100644
--- a/clients/client-lookoutvision/src/LookoutVisionClient.ts
+++ b/clients/client-lookoutvision/src/LookoutVisionClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -160,7 +161,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-machine-learning/src/MachineLearningClient.ts b/clients/client-machine-learning/src/MachineLearningClient.ts
index 92790df36173e..e3b1e38d41d81 100644
--- a/clients/client-machine-learning/src/MachineLearningClient.ts
+++ b/clients/client-machine-learning/src/MachineLearningClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -196,7 +197,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-macie/src/MacieClient.ts b/clients/client-macie/src/MacieClient.ts
index b38fff42d39b0..a80c5410b3c2a 100644
--- a/clients/client-macie/src/MacieClient.ts
+++ b/clients/client-macie/src/MacieClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -112,7 +113,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-macie2/src/Macie2Client.ts b/clients/client-macie2/src/Macie2Client.ts
index e1d0cbc5da07c..8e3811fbef73f 100644
--- a/clients/client-macie2/src/Macie2Client.ts
+++ b/clients/client-macie2/src/Macie2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -349,7 +350,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-managedblockchain/src/ManagedBlockchainClient.ts b/clients/client-managedblockchain/src/ManagedBlockchainClient.ts
index aeff66202c945..02f7255a3715c 100644
--- a/clients/client-managedblockchain/src/ManagedBlockchainClient.ts
+++ b/clients/client-managedblockchain/src/ManagedBlockchainClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -151,7 +152,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-marketplace-catalog/src/MarketplaceCatalogClient.ts b/clients/client-marketplace-catalog/src/MarketplaceCatalogClient.ts
index fda7ae6b241fa..dcbbe5b26456e 100644
--- a/clients/client-marketplace-catalog/src/MarketplaceCatalogClient.ts
+++ b/clients/client-marketplace-catalog/src/MarketplaceCatalogClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -97,7 +98,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-marketplace-commerce-analytics/src/MarketplaceCommerceAnalyticsClient.ts b/clients/client-marketplace-commerce-analytics/src/MarketplaceCommerceAnalyticsClient.ts
index c173346191b97..5594b037ca288 100644
--- a/clients/client-marketplace-commerce-analytics/src/MarketplaceCommerceAnalyticsClient.ts
+++ b/clients/client-marketplace-commerce-analytics/src/MarketplaceCommerceAnalyticsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -84,7 +85,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-marketplace-entitlement-service/src/MarketplaceEntitlementServiceClient.ts b/clients/client-marketplace-entitlement-service/src/MarketplaceEntitlementServiceClient.ts
index 8696047c0532e..0b2109d5f0271 100644
--- a/clients/client-marketplace-entitlement-service/src/MarketplaceEntitlementServiceClient.ts
+++ b/clients/client-marketplace-entitlement-service/src/MarketplaceEntitlementServiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -80,7 +81,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-marketplace-metering/src/MarketplaceMeteringClient.ts b/clients/client-marketplace-metering/src/MarketplaceMeteringClient.ts
index 8ad08ca06c124..d447e402f3437 100644
--- a/clients/client-marketplace-metering/src/MarketplaceMeteringClient.ts
+++ b/clients/client-marketplace-metering/src/MarketplaceMeteringClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -91,7 +92,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mediaconnect/src/MediaConnectClient.ts b/clients/client-mediaconnect/src/MediaConnectClient.ts
index bd56767e4078f..e2b943a8e58a5 100644
--- a/clients/client-mediaconnect/src/MediaConnectClient.ts
+++ b/clients/client-mediaconnect/src/MediaConnectClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -199,7 +200,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mediaconvert/src/MediaConvertClient.ts b/clients/client-mediaconvert/src/MediaConvertClient.ts
index 0e6d453d2a180..c3275b43f3c5f 100644
--- a/clients/client-mediaconvert/src/MediaConvertClient.ts
+++ b/clients/client-mediaconvert/src/MediaConvertClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -172,7 +173,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-medialive/src/MediaLiveClient.ts b/clients/client-medialive/src/MediaLiveClient.ts
index 9f000f45b781f..c6c66b2beee9e 100644
--- a/clients/client-medialive/src/MediaLiveClient.ts
+++ b/clients/client-medialive/src/MediaLiveClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -310,7 +311,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mediapackage-vod/src/MediaPackageVodClient.ts b/clients/client-mediapackage-vod/src/MediaPackageVodClient.ts
index 1c2cbf64b66b9..301bfc0a5c7ef 100644
--- a/clients/client-mediapackage-vod/src/MediaPackageVodClient.ts
+++ b/clients/client-mediapackage-vod/src/MediaPackageVodClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -160,7 +161,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mediapackage/src/MediaPackageClient.ts b/clients/client-mediapackage/src/MediaPackageClient.ts
index 1b899912b56ae..e2fde94a37388 100644
--- a/clients/client-mediapackage/src/MediaPackageClient.ts
+++ b/clients/client-mediapackage/src/MediaPackageClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -160,7 +161,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mediastore-data/src/MediaStoreDataClient.ts b/clients/client-mediastore-data/src/MediaStoreDataClient.ts
index af12a6541fbdc..334d9887f2650 100644
--- a/clients/client-mediastore-data/src/MediaStoreDataClient.ts
+++ b/clients/client-mediastore-data/src/MediaStoreDataClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -94,7 +95,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mediastore/src/MediaStoreClient.ts b/clients/client-mediastore/src/MediaStoreClient.ts
index 2c007d6a5f8ce..f55b552624665 100644
--- a/clients/client-mediastore/src/MediaStoreClient.ts
+++ b/clients/client-mediastore/src/MediaStoreClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -151,7 +152,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mediatailor/src/MediaTailorClient.ts b/clients/client-mediatailor/src/MediaTailorClient.ts
index d5db95cbd7fa0..e9215b1a46b44 100644
--- a/clients/client-mediatailor/src/MediaTailorClient.ts
+++ b/clients/client-mediatailor/src/MediaTailorClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -238,7 +239,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-memorydb/src/MemoryDBClient.ts b/clients/client-memorydb/src/MemoryDBClient.ts
index b4c111da30a7d..bdcbb559be906 100644
--- a/clients/client-memorydb/src/MemoryDBClient.ts
+++ b/clients/client-memorydb/src/MemoryDBClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -211,7 +212,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mgn/src/MgnClient.ts b/clients/client-mgn/src/MgnClient.ts
index 81ee4c256553b..dad393b48132a 100644
--- a/clients/client-mgn/src/MgnClient.ts
+++ b/clients/client-mgn/src/MgnClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -220,7 +221,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-migration-hub-refactor-spaces/src/MigrationHubRefactorSpacesClient.ts b/clients/client-migration-hub-refactor-spaces/src/MigrationHubRefactorSpacesClient.ts
index 038c02bf2468c..840ccbf6d766f 100644
--- a/clients/client-migration-hub-refactor-spaces/src/MigrationHubRefactorSpacesClient.ts
+++ b/clients/client-migration-hub-refactor-spaces/src/MigrationHubRefactorSpacesClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -157,7 +158,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-migration-hub/src/MigrationHubClient.ts b/clients/client-migration-hub/src/MigrationHubClient.ts
index b3bf4414ec878..89bd2da963db7 100644
--- a/clients/client-migration-hub/src/MigrationHubClient.ts
+++ b/clients/client-migration-hub/src/MigrationHubClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -178,7 +179,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-migrationhub-config/src/MigrationHubConfigClient.ts b/clients/client-migrationhub-config/src/MigrationHubConfigClient.ts
index 77fb3591ae669..abe686e79b506 100644
--- a/clients/client-migrationhub-config/src/MigrationHubConfigClient.ts
+++ b/clients/client-migrationhub-config/src/MigrationHubConfigClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -94,7 +95,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-migrationhubstrategy/src/MigrationHubStrategyClient.ts b/clients/client-migrationhubstrategy/src/MigrationHubStrategyClient.ts
index 1c753e02eb059..9259ffb256f44 100644
--- a/clients/client-migrationhubstrategy/src/MigrationHubStrategyClient.ts
+++ b/clients/client-migrationhubstrategy/src/MigrationHubStrategyClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -172,7 +173,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mobile/src/MobileClient.ts b/clients/client-mobile/src/MobileClient.ts
index 0c9e1b52508f0..8ba8ecf65fdfd 100644
--- a/clients/client-mobile/src/MobileClient.ts
+++ b/clients/client-mobile/src/MobileClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -106,7 +107,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mq/src/MqClient.ts b/clients/client-mq/src/MqClient.ts
index b441377ed0ddd..2a54ed6f45475 100644
--- a/clients/client-mq/src/MqClient.ts
+++ b/clients/client-mq/src/MqClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -166,7 +167,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mturk/src/MTurkClient.ts b/clients/client-mturk/src/MTurkClient.ts
index d1892c91519c2..67506b4431d05 100644
--- a/clients/client-mturk/src/MTurkClient.ts
+++ b/clients/client-mturk/src/MTurkClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -259,7 +260,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-mwaa/src/MWAAClient.ts b/clients/client-mwaa/src/MWAAClient.ts
index 8b39c06bc8611..c07ec7cfd34ad 100644
--- a/clients/client-mwaa/src/MWAAClient.ts
+++ b/clients/client-mwaa/src/MWAAClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -118,7 +119,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-neptune/src/NeptuneClient.ts b/clients/client-neptune/src/NeptuneClient.ts
index 27b40c54b7172..837a086a9d9d8 100644
--- a/clients/client-neptune/src/NeptuneClient.ts
+++ b/clients/client-neptune/src/NeptuneClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -415,7 +416,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-network-firewall/src/NetworkFirewallClient.ts b/clients/client-network-firewall/src/NetworkFirewallClient.ts
index 48199ab8d9e0e..783eaad4325c0 100644
--- a/clients/client-network-firewall/src/NetworkFirewallClient.ts
+++ b/clients/client-network-firewall/src/NetworkFirewallClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -220,7 +221,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-networkmanager/src/NetworkManagerClient.ts b/clients/client-networkmanager/src/NetworkManagerClient.ts
index a4f0e5b2c74c7..198373d8b814a 100644
--- a/clients/client-networkmanager/src/NetworkManagerClient.ts
+++ b/clients/client-networkmanager/src/NetworkManagerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -418,7 +419,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-nimble/src/NimbleClient.ts b/clients/client-nimble/src/NimbleClient.ts
index 153d712599555..9a296e9ebc485 100644
--- a/clients/client-nimble/src/NimbleClient.ts
+++ b/clients/client-nimble/src/NimbleClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -307,7 +308,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-opensearch/src/OpenSearchClient.ts b/clients/client-opensearch/src/OpenSearchClient.ts
index 86f54cf2b9ac6..4bccfdc83e05d 100644
--- a/clients/client-opensearch/src/OpenSearchClient.ts
+++ b/clients/client-opensearch/src/OpenSearchClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -262,7 +263,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-opsworks/src/OpsWorksClient.ts b/clients/client-opsworks/src/OpsWorksClient.ts
index e059dbc42d04a..ebf5679b51d59 100644
--- a/clients/client-opsworks/src/OpsWorksClient.ts
+++ b/clients/client-opsworks/src/OpsWorksClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -379,7 +380,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-opsworkscm/src/OpsWorksCMClient.ts b/clients/client-opsworkscm/src/OpsWorksCMClient.ts
index e4689f44ae568..d86c7e35a96d9 100644
--- a/clients/client-opsworkscm/src/OpsWorksCMClient.ts
+++ b/clients/client-opsworkscm/src/OpsWorksCMClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -151,7 +152,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-organizations/src/OrganizationsClient.ts b/clients/client-organizations/src/OrganizationsClient.ts
index b78c18147a3ec..667e521604576 100644
--- a/clients/client-organizations/src/OrganizationsClient.ts
+++ b/clients/client-organizations/src/OrganizationsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -307,7 +308,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-outposts/src/OutpostsClient.ts b/clients/client-outposts/src/OutpostsClient.ts
index d6c167ad39b62..7265b66e5eaf1 100644
--- a/clients/client-outposts/src/OutpostsClient.ts
+++ b/clients/client-outposts/src/OutpostsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -157,7 +158,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-panorama/src/PanoramaClient.ts b/clients/client-panorama/src/PanoramaClient.ts
index 4f50285d0862b..6296ce785852b 100644
--- a/clients/client-panorama/src/PanoramaClient.ts
+++ b/clients/client-panorama/src/PanoramaClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -235,7 +236,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-personalize-events/src/PersonalizeEventsClient.ts b/clients/client-personalize-events/src/PersonalizeEventsClient.ts
index 98e67a76c2d04..5ef3ef31fe910 100644
--- a/clients/client-personalize-events/src/PersonalizeEventsClient.ts
+++ b/clients/client-personalize-events/src/PersonalizeEventsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -82,7 +83,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-personalize-runtime/src/PersonalizeRuntimeClient.ts b/clients/client-personalize-runtime/src/PersonalizeRuntimeClient.ts
index eb694fb7886a4..25cb12b068f2b 100644
--- a/clients/client-personalize-runtime/src/PersonalizeRuntimeClient.ts
+++ b/clients/client-personalize-runtime/src/PersonalizeRuntimeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -84,7 +85,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-personalize/src/PersonalizeClient.ts b/clients/client-personalize/src/PersonalizeClient.ts
index ab1edc32c41ba..3da2e92d4c88c 100644
--- a/clients/client-personalize/src/PersonalizeClient.ts
+++ b/clients/client-personalize/src/PersonalizeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -304,7 +305,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-pi/src/PIClient.ts b/clients/client-pi/src/PIClient.ts
index bcd6d761a0ee9..dcee4f90ec57d 100644
--- a/clients/client-pi/src/PIClient.ts
+++ b/clients/client-pi/src/PIClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -112,7 +113,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-pinpoint-email/src/PinpointEmailClient.ts b/clients/client-pinpoint-email/src/PinpointEmailClient.ts
index 9078ab4c997c3..c05a6e42ceb91 100644
--- a/clients/client-pinpoint-email/src/PinpointEmailClient.ts
+++ b/clients/client-pinpoint-email/src/PinpointEmailClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -310,7 +311,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-pinpoint-sms-voice/src/PinpointSMSVoiceClient.ts b/clients/client-pinpoint-sms-voice/src/PinpointSMSVoiceClient.ts
index 8f88a3c72d3f3..a96a572c0d1ee 100644
--- a/clients/client-pinpoint-sms-voice/src/PinpointSMSVoiceClient.ts
+++ b/clients/client-pinpoint-sms-voice/src/PinpointSMSVoiceClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -124,7 +125,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-pinpoint/src/PinpointClient.ts b/clients/client-pinpoint/src/PinpointClient.ts
index c2121154b8e96..ff78aa84bb80a 100644
--- a/clients/client-pinpoint/src/PinpointClient.ts
+++ b/clients/client-pinpoint/src/PinpointClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -553,7 +554,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-polly/src/PollyClient.ts b/clients/client-polly/src/PollyClient.ts
index 4406604ef8958..98f3d4525dc82 100644
--- a/clients/client-polly/src/PollyClient.ts
+++ b/clients/client-polly/src/PollyClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -115,7 +116,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-pricing/src/PricingClient.ts b/clients/client-pricing/src/PricingClient.ts
index a059f8a79300b..756980cdc890e 100644
--- a/clients/client-pricing/src/PricingClient.ts
+++ b/clients/client-pricing/src/PricingClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -85,7 +86,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-proton/src/ProtonClient.ts b/clients/client-proton/src/ProtonClient.ts
index ea530ba019181..62b65e5dcef8f 100644
--- a/clients/client-proton/src/ProtonClient.ts
+++ b/clients/client-proton/src/ProtonClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -424,7 +425,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-qldb-session/src/QLDBSessionClient.ts b/clients/client-qldb-session/src/QLDBSessionClient.ts
index 4a72fc1afd2a9..981dd36a8e360 100644
--- a/clients/client-qldb-session/src/QLDBSessionClient.ts
+++ b/clients/client-qldb-session/src/QLDBSessionClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -80,7 +81,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-qldb/src/QLDBClient.ts b/clients/client-qldb/src/QLDBClient.ts
index e326a779d0d48..28aa6a2d3f2be 100644
--- a/clients/client-qldb/src/QLDBClient.ts
+++ b/clients/client-qldb/src/QLDBClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -166,7 +167,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-quicksight/src/QuickSightClient.ts b/clients/client-quicksight/src/QuickSightClient.ts
index 893f7440f7943..893728e2f22ef 100644
--- a/clients/client-quicksight/src/QuickSightClient.ts
+++ b/clients/client-quicksight/src/QuickSightClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -565,7 +566,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ram/src/RAMClient.ts b/clients/client-ram/src/RAMClient.ts
index 714252c1855b7..5952f4eaded3d 100644
--- a/clients/client-ram/src/RAMClient.ts
+++ b/clients/client-ram/src/RAMClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -205,7 +206,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-rbin/src/RbinClient.ts b/clients/client-rbin/src/RbinClient.ts
index 6ec57c864911f..43d5b3e478954 100644
--- a/clients/client-rbin/src/RbinClient.ts
+++ b/clients/client-rbin/src/RbinClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -106,7 +107,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-rds-data/src/RDSDataClient.ts b/clients/client-rds-data/src/RDSDataClient.ts
index 87cf54502dd3e..882e3dab8b623 100644
--- a/clients/client-rds-data/src/RDSDataClient.ts
+++ b/clients/client-rds-data/src/RDSDataClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -103,7 +104,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-rds/src/RDSClient.ts b/clients/client-rds/src/RDSClient.ts
index 4230cd56d9cb1..6b22f2a4b3eaa 100644
--- a/clients/client-rds/src/RDSClient.ts
+++ b/clients/client-rds/src/RDSClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -817,7 +818,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-redshift-data/src/RedshiftDataClient.ts b/clients/client-redshift-data/src/RedshiftDataClient.ts
index 3208064cbac39..1578536484e6e 100644
--- a/clients/client-redshift-data/src/RedshiftDataClient.ts
+++ b/clients/client-redshift-data/src/RedshiftDataClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -112,7 +113,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-redshift/src/RedshiftClient.ts b/clients/client-redshift/src/RedshiftClient.ts
index 096d57f912925..f7600345df685 100644
--- a/clients/client-redshift/src/RedshiftClient.ts
+++ b/clients/client-redshift/src/RedshiftClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -706,7 +707,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-rekognition/src/RekognitionClient.ts b/clients/client-rekognition/src/RekognitionClient.ts
index 6fa93528c0eb0..c7130b1a1c706 100644
--- a/clients/client-rekognition/src/RekognitionClient.ts
+++ b/clients/client-rekognition/src/RekognitionClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -325,7 +326,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-resiliencehub/src/ResiliencehubClient.ts b/clients/client-resiliencehub/src/ResiliencehubClient.ts
index 744b7f40b164c..0b6878585b9fe 100644
--- a/clients/client-resiliencehub/src/ResiliencehubClient.ts
+++ b/clients/client-resiliencehub/src/ResiliencehubClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -280,7 +281,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-resource-groups-tagging-api/src/ResourceGroupsTaggingAPIClient.ts b/clients/client-resource-groups-tagging-api/src/ResourceGroupsTaggingAPIClient.ts
index 6dcf5b928dc88..a2b9db5cb9ef4 100644
--- a/clients/client-resource-groups-tagging-api/src/ResourceGroupsTaggingAPIClient.ts
+++ b/clients/client-resource-groups-tagging-api/src/ResourceGroupsTaggingAPIClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -112,7 +113,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-resource-groups/src/ResourceGroupsClient.ts b/clients/client-resource-groups/src/ResourceGroupsClient.ts
index c9875d59ea3db..37ebeb605824e 100644
--- a/clients/client-resource-groups/src/ResourceGroupsClient.ts
+++ b/clients/client-resource-groups/src/ResourceGroupsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -133,7 +134,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-robomaker/src/RoboMakerClient.ts b/clients/client-robomaker/src/RoboMakerClient.ts
index 5bed64a224251..ed7eda462fa57 100644
--- a/clients/client-robomaker/src/RoboMakerClient.ts
+++ b/clients/client-robomaker/src/RoboMakerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -364,7 +365,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-route-53-domains/src/Route53DomainsClient.ts b/clients/client-route-53-domains/src/Route53DomainsClient.ts
index e3898569eda6b..29789638bae5f 100644
--- a/clients/client-route-53-domains/src/Route53DomainsClient.ts
+++ b/clients/client-route-53-domains/src/Route53DomainsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -226,7 +227,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-route-53/src/Route53Client.ts b/clients/client-route-53/src/Route53Client.ts
index e4d615a7f5c80..509d3c95698f6 100644
--- a/clients/client-route-53/src/Route53Client.ts
+++ b/clients/client-route-53/src/Route53Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -406,7 +407,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-route53-recovery-cluster/src/Route53RecoveryClusterClient.ts b/clients/client-route53-recovery-cluster/src/Route53RecoveryClusterClient.ts
index 6bddbea25ec0f..7f3c4b1d17ed4 100644
--- a/clients/client-route53-recovery-cluster/src/Route53RecoveryClusterClient.ts
+++ b/clients/client-route53-recovery-cluster/src/Route53RecoveryClusterClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -97,7 +98,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-route53-recovery-control-config/src/Route53RecoveryControlConfigClient.ts b/clients/client-route53-recovery-control-config/src/Route53RecoveryControlConfigClient.ts
index 0a3a43a341b99..fa31a005c5b3a 100644
--- a/clients/client-route53-recovery-control-config/src/Route53RecoveryControlConfigClient.ts
+++ b/clients/client-route53-recovery-control-config/src/Route53RecoveryControlConfigClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -172,7 +173,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-route53-recovery-readiness/src/Route53RecoveryReadinessClient.ts b/clients/client-route53-recovery-readiness/src/Route53RecoveryReadinessClient.ts
index 99de49af30868..818d12899c4cf 100644
--- a/clients/client-route53-recovery-readiness/src/Route53RecoveryReadinessClient.ts
+++ b/clients/client-route53-recovery-readiness/src/Route53RecoveryReadinessClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -223,7 +224,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-route53resolver/src/Route53ResolverClient.ts b/clients/client-route53resolver/src/Route53ResolverClient.ts
index a89f2ffe21ad4..b6c4f63d2fd0b 100644
--- a/clients/client-route53resolver/src/Route53ResolverClient.ts
+++ b/clients/client-route53resolver/src/Route53ResolverClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -418,7 +419,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-rum/src/RUMClient.ts b/clients/client-rum/src/RUMClient.ts
index 4e0c54433aaa0..b90f9145963da 100644
--- a/clients/client-rum/src/RUMClient.ts
+++ b/clients/client-rum/src/RUMClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -112,7 +113,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-s3-control/src/S3ControlClient.ts b/clients/client-s3-control/src/S3ControlClient.ts
index 127fbd04ade56..8184c1651394c 100644
--- a/clients/client-s3-control/src/S3ControlClient.ts
+++ b/clients/client-s3-control/src/S3ControlClient.ts
@@ -40,6 +40,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -368,7 +369,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-s3/src/S3Client.ts b/clients/client-s3/src/S3Client.ts
index d1e73f0c5fd63..727fd4bdad6ab 100644
--- a/clients/client-s3/src/S3Client.ts
+++ b/clients/client-s3/src/S3Client.ts
@@ -47,6 +47,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -530,7 +531,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-s3outposts/src/S3OutpostsClient.ts b/clients/client-s3outposts/src/S3OutpostsClient.ts
index 2d490897acbfb..18b4cdc98a70f 100644
--- a/clients/client-s3outposts/src/S3OutpostsClient.ts
+++ b/clients/client-s3outposts/src/S3OutpostsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -82,7 +83,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sagemaker-a2i-runtime/src/SageMakerA2IRuntimeClient.ts b/clients/client-sagemaker-a2i-runtime/src/SageMakerA2IRuntimeClient.ts
index 8f6bfd63c1564..b51c9cf94ed41 100644
--- a/clients/client-sagemaker-a2i-runtime/src/SageMakerA2IRuntimeClient.ts
+++ b/clients/client-sagemaker-a2i-runtime/src/SageMakerA2IRuntimeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -94,7 +95,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sagemaker-edge/src/SagemakerEdgeClient.ts b/clients/client-sagemaker-edge/src/SagemakerEdgeClient.ts
index 96a405d14dd68..ab017a16357f7 100644
--- a/clients/client-sagemaker-edge/src/SagemakerEdgeClient.ts
+++ b/clients/client-sagemaker-edge/src/SagemakerEdgeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -84,7 +85,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sagemaker-featurestore-runtime/src/SageMakerFeatureStoreRuntimeClient.ts b/clients/client-sagemaker-featurestore-runtime/src/SageMakerFeatureStoreRuntimeClient.ts
index 96e2654e4421a..6d709475d7c74 100644
--- a/clients/client-sagemaker-featurestore-runtime/src/SageMakerFeatureStoreRuntimeClient.ts
+++ b/clients/client-sagemaker-featurestore-runtime/src/SageMakerFeatureStoreRuntimeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -91,7 +92,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sagemaker-runtime/src/SageMakerRuntimeClient.ts b/clients/client-sagemaker-runtime/src/SageMakerRuntimeClient.ts
index 53160a774955b..45b1a4740f710 100644
--- a/clients/client-sagemaker-runtime/src/SageMakerRuntimeClient.ts
+++ b/clients/client-sagemaker-runtime/src/SageMakerRuntimeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -84,7 +85,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sagemaker/src/SageMakerClient.ts b/clients/client-sagemaker/src/SageMakerClient.ts
index d0ea417a895f8..4fa0435c5611f 100644
--- a/clients/client-sagemaker/src/SageMakerClient.ts
+++ b/clients/client-sagemaker/src/SageMakerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -1207,7 +1208,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-savingsplans/src/SavingsplansClient.ts b/clients/client-savingsplans/src/SavingsplansClient.ts
index 033db3c30f76a..8585ac7503818 100644
--- a/clients/client-savingsplans/src/SavingsplansClient.ts
+++ b/clients/client-savingsplans/src/SavingsplansClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -124,7 +125,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-schemas/src/SchemasClient.ts b/clients/client-schemas/src/SchemasClient.ts
index ed6a5820fea81..29ec8959becf3 100644
--- a/clients/client-schemas/src/SchemasClient.ts
+++ b/clients/client-schemas/src/SchemasClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -190,7 +191,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-secrets-manager/src/SecretsManagerClient.ts b/clients/client-secrets-manager/src/SecretsManagerClient.ts
index d52e76bbcebd4..ce382dd1bd3a6 100644
--- a/clients/client-secrets-manager/src/SecretsManagerClient.ts
+++ b/clients/client-secrets-manager/src/SecretsManagerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -166,7 +167,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-securityhub/src/SecurityHubClient.ts b/clients/client-securityhub/src/SecurityHubClient.ts
index d453c071783ad..a4564fe702c9a 100644
--- a/clients/client-securityhub/src/SecurityHubClient.ts
+++ b/clients/client-securityhub/src/SecurityHubClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -334,7 +335,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-serverlessapplicationrepository/src/ServerlessApplicationRepositoryClient.ts b/clients/client-serverlessapplicationrepository/src/ServerlessApplicationRepositoryClient.ts
index a813492662751..4a61e96fb7a0e 100644
--- a/clients/client-serverlessapplicationrepository/src/ServerlessApplicationRepositoryClient.ts
+++ b/clients/client-serverlessapplicationrepository/src/ServerlessApplicationRepositoryClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -145,7 +146,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-service-catalog-appregistry/src/ServiceCatalogAppRegistryClient.ts b/clients/client-service-catalog-appregistry/src/ServiceCatalogAppRegistryClient.ts
index 86444ca4d6cd7..5df15c8610589 100644
--- a/clients/client-service-catalog-appregistry/src/ServiceCatalogAppRegistryClient.ts
+++ b/clients/client-service-catalog-appregistry/src/ServiceCatalogAppRegistryClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -175,7 +176,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-service-catalog/src/ServiceCatalogClient.ts b/clients/client-service-catalog/src/ServiceCatalogClient.ts
index a7e11c06cf69b..f0cbb7edbadc6 100644
--- a/clients/client-service-catalog/src/ServiceCatalogClient.ts
+++ b/clients/client-service-catalog/src/ServiceCatalogClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -526,7 +527,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-service-quotas/src/ServiceQuotasClient.ts b/clients/client-service-quotas/src/ServiceQuotasClient.ts
index 3e3d59c5a14cc..bb9e3d04f2c71 100644
--- a/clients/client-service-quotas/src/ServiceQuotasClient.ts
+++ b/clients/client-service-quotas/src/ServiceQuotasClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -178,7 +179,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-servicediscovery/src/ServiceDiscoveryClient.ts b/clients/client-servicediscovery/src/ServiceDiscoveryClient.ts
index 505fad5ea465f..39869ae3b42ad 100644
--- a/clients/client-servicediscovery/src/ServiceDiscoveryClient.ts
+++ b/clients/client-servicediscovery/src/ServiceDiscoveryClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -184,7 +185,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ses/src/SESClient.ts b/clients/client-ses/src/SESClient.ts
index e3b08dcdb8d22..d076f9bb810f5 100644
--- a/clients/client-ses/src/SESClient.ts
+++ b/clients/client-ses/src/SESClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -442,7 +443,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sesv2/src/SESv2Client.ts b/clients/client-sesv2/src/SESv2Client.ts
index fc1dd116fb8b6..4261626052c5e 100644
--- a/clients/client-sesv2/src/SESv2Client.ts
+++ b/clients/client-sesv2/src/SESv2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -493,7 +494,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sfn/src/SFNClient.ts b/clients/client-sfn/src/SFNClient.ts
index 02553186b2153..80e11ba563f08 100644
--- a/clients/client-sfn/src/SFNClient.ts
+++ b/clients/client-sfn/src/SFNClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -160,7 +161,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-shield/src/ShieldClient.ts b/clients/client-shield/src/ShieldClient.ts
index 4ffd80ae90b6f..aed5a9e816142 100644
--- a/clients/client-shield/src/ShieldClient.ts
+++ b/clients/client-shield/src/ShieldClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -256,7 +257,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-signer/src/SignerClient.ts b/clients/client-signer/src/SignerClient.ts
index 441e2a8c02aba..c8f5faa476fb9 100644
--- a/clients/client-signer/src/SignerClient.ts
+++ b/clients/client-signer/src/SignerClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -154,7 +155,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sms/src/SMSClient.ts b/clients/client-sms/src/SMSClient.ts
index 5e9774edf2bdd..8f2425c5263c2 100644
--- a/clients/client-sms/src/SMSClient.ts
+++ b/clients/client-sms/src/SMSClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -244,7 +245,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-snow-device-management/src/SnowDeviceManagementClient.ts b/clients/client-snow-device-management/src/SnowDeviceManagementClient.ts
index a40d2d34025d4..a6df29a2ccb78 100644
--- a/clients/client-snow-device-management/src/SnowDeviceManagementClient.ts
+++ b/clients/client-snow-device-management/src/SnowDeviceManagementClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -127,7 +128,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-snowball/src/SnowballClient.ts b/clients/client-snowball/src/SnowballClient.ts
index d58e409956092..7c0e3e94a6ff7 100644
--- a/clients/client-snowball/src/SnowballClient.ts
+++ b/clients/client-snowball/src/SnowballClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -175,7 +176,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sns/src/SNSClient.ts b/clients/client-sns/src/SNSClient.ts
index 432ef861bbd97..d7f2b6a6e2f77 100644
--- a/clients/client-sns/src/SNSClient.ts
+++ b/clients/client-sns/src/SNSClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -265,7 +266,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sqs/src/SQSClient.ts b/clients/client-sqs/src/SQSClient.ts
index f8c388ec6ae3d..e78f07812377c 100644
--- a/clients/client-sqs/src/SQSClient.ts
+++ b/clients/client-sqs/src/SQSClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -148,7 +149,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ssm-contacts/src/SSMContactsClient.ts b/clients/client-ssm-contacts/src/SSMContactsClient.ts
index 64796ca8d7e14..7207da582abeb 100644
--- a/clients/client-ssm-contacts/src/SSMContactsClient.ts
+++ b/clients/client-ssm-contacts/src/SSMContactsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -184,7 +185,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ssm-incidents/src/SSMIncidentsClient.ts b/clients/client-ssm-incidents/src/SSMIncidentsClient.ts
index d3534e288fced..1dfe536ff7344 100644
--- a/clients/client-ssm-incidents/src/SSMIncidentsClient.ts
+++ b/clients/client-ssm-incidents/src/SSMIncidentsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -208,7 +209,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-ssm/src/SSMClient.ts b/clients/client-ssm/src/SSMClient.ts
index 5d41a3e30a7a6..057638c73653d 100644
--- a/clients/client-ssm/src/SSMClient.ts
+++ b/clients/client-ssm/src/SSMClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -754,7 +755,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sso-admin/src/SSOAdminClient.ts b/clients/client-sso-admin/src/SSOAdminClient.ts
index 32635d2edf5ca..d8d4684b585a8 100644
--- a/clients/client-sso-admin/src/SSOAdminClient.ts
+++ b/clients/client-sso-admin/src/SSOAdminClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -253,7 +254,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sso-oidc/src/SSOOIDCClient.ts b/clients/client-sso-oidc/src/SSOOIDCClient.ts
index b63aeea636c0e..5143a73b5c957 100644
--- a/clients/client-sso-oidc/src/SSOOIDCClient.ts
+++ b/clients/client-sso-oidc/src/SSOOIDCClient.ts
@@ -29,6 +29,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Decoder as __Decoder,
   Encoder as __Encoder,
   Hash as __Hash,
@@ -84,7 +85,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sso/src/SSOClient.ts b/clients/client-sso/src/SSOClient.ts
index 4148b29ea0138..234480fa7a54a 100644
--- a/clients/client-sso/src/SSOClient.ts
+++ b/clients/client-sso/src/SSOClient.ts
@@ -29,6 +29,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Decoder as __Decoder,
   Encoder as __Encoder,
   Hash as __Hash,
@@ -84,7 +85,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-storage-gateway/src/StorageGatewayClient.ts b/clients/client-storage-gateway/src/StorageGatewayClient.ts
index d89d1e7e733bf..ac3d4e81d9693 100644
--- a/clients/client-storage-gateway/src/StorageGatewayClient.ts
+++ b/clients/client-storage-gateway/src/StorageGatewayClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -502,7 +503,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-sts/src/STSClient.ts b/clients/client-sts/src/STSClient.ts
index b7c3a5689f2d0..682b1c954e106 100644
--- a/clients/client-sts/src/STSClient.ts
+++ b/clients/client-sts/src/STSClient.ts
@@ -30,6 +30,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -104,7 +105,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-support/src/SupportClient.ts b/clients/client-support/src/SupportClient.ts
index b3748702f4e42..f83b059aaf42c 100644
--- a/clients/client-support/src/SupportClient.ts
+++ b/clients/client-support/src/SupportClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -148,7 +149,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-swf/src/SWFClient.ts b/clients/client-swf/src/SWFClient.ts
index eb763211ec592..e613e89c31190 100644
--- a/clients/client-swf/src/SWFClient.ts
+++ b/clients/client-swf/src/SWFClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -274,7 +275,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-synthetics/src/SyntheticsClient.ts b/clients/client-synthetics/src/SyntheticsClient.ts
index 080dd01bf19fa..a1aa3bdb5ee71 100644
--- a/clients/client-synthetics/src/SyntheticsClient.ts
+++ b/clients/client-synthetics/src/SyntheticsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -127,7 +128,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-textract/src/TextractClient.ts b/clients/client-textract/src/TextractClient.ts
index db76d5c54634e..267c7beae0b4c 100644
--- a/clients/client-textract/src/TextractClient.ts
+++ b/clients/client-textract/src/TextractClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -124,7 +125,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-timestream-query/src/TimestreamQueryClient.ts b/clients/client-timestream-query/src/TimestreamQueryClient.ts
index a3ceaaf780446..9342e6218ffb1 100644
--- a/clients/client-timestream-query/src/TimestreamQueryClient.ts
+++ b/clients/client-timestream-query/src/TimestreamQueryClient.ts
@@ -40,6 +40,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -148,7 +149,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-timestream-write/src/TimestreamWriteClient.ts b/clients/client-timestream-write/src/TimestreamWriteClient.ts
index ddc4b5ae0f5a1..34fbfae425513 100644
--- a/clients/client-timestream-write/src/TimestreamWriteClient.ts
+++ b/clients/client-timestream-write/src/TimestreamWriteClient.ts
@@ -40,6 +40,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -136,7 +137,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-transcribe-streaming/src/TranscribeStreamingClient.ts b/clients/client-transcribe-streaming/src/TranscribeStreamingClient.ts
index 2ec9030eca896..52896f0283285 100644
--- a/clients/client-transcribe-streaming/src/TranscribeStreamingClient.ts
+++ b/clients/client-transcribe-streaming/src/TranscribeStreamingClient.ts
@@ -51,6 +51,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -105,7 +106,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-transcribe/src/TranscribeClient.ts b/clients/client-transcribe/src/TranscribeClient.ts
index b4e06075fc686..2463c4f67cc71 100644
--- a/clients/client-transcribe/src/TranscribeClient.ts
+++ b/clients/client-transcribe/src/TranscribeClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -289,7 +290,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-transfer/src/TransferClient.ts b/clients/client-transfer/src/TransferClient.ts
index 4c93ed0ef3566..de219e9b70b98 100644
--- a/clients/client-transfer/src/TransferClient.ts
+++ b/clients/client-transfer/src/TransferClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -190,7 +191,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-translate/src/TranslateClient.ts b/clients/client-translate/src/TranslateClient.ts
index 63cb876cbdd49..7d49da83338db 100644
--- a/clients/client-translate/src/TranslateClient.ts
+++ b/clients/client-translate/src/TranslateClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -133,7 +134,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-voice-id/src/VoiceIDClient.ts b/clients/client-voice-id/src/VoiceIDClient.ts
index b9bb6c9f2b725..fa1bdf2ca9c73 100644
--- a/clients/client-voice-id/src/VoiceIDClient.ts
+++ b/clients/client-voice-id/src/VoiceIDClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -163,7 +164,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-waf-regional/src/WAFRegionalClient.ts b/clients/client-waf-regional/src/WAFRegionalClient.ts
index 4ff72b618d38e..660e2ba023944 100644
--- a/clients/client-waf-regional/src/WAFRegionalClient.ts
+++ b/clients/client-waf-regional/src/WAFRegionalClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -427,7 +428,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-waf/src/WAFClient.ts b/clients/client-waf/src/WAFClient.ts
index 313c1a9359100..29a5d78197699 100644
--- a/clients/client-waf/src/WAFClient.ts
+++ b/clients/client-waf/src/WAFClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -409,7 +410,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-wafv2/src/WAFV2Client.ts b/clients/client-wafv2/src/WAFV2Client.ts
index d1baa671bf478..045a1c51a3af6 100644
--- a/clients/client-wafv2/src/WAFV2Client.ts
+++ b/clients/client-wafv2/src/WAFV2Client.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -298,7 +299,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-wellarchitected/src/WellArchitectedClient.ts b/clients/client-wellarchitected/src/WellArchitectedClient.ts
index 9b759f204bb1a..819f24938ac4b 100644
--- a/clients/client-wellarchitected/src/WellArchitectedClient.ts
+++ b/clients/client-wellarchitected/src/WellArchitectedClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -223,7 +224,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-wisdom/src/WisdomClient.ts b/clients/client-wisdom/src/WisdomClient.ts
index c97747d26dce5..0f2676fdcc38e 100644
--- a/clients/client-wisdom/src/WisdomClient.ts
+++ b/clients/client-wisdom/src/WisdomClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -202,7 +203,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-workdocs/src/WorkDocsClient.ts b/clients/client-workdocs/src/WorkDocsClient.ts
index 615b23891b6c6..362f983df1cde 100644
--- a/clients/client-workdocs/src/WorkDocsClient.ts
+++ b/clients/client-workdocs/src/WorkDocsClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -250,7 +251,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-worklink/src/WorkLinkClient.ts b/clients/client-worklink/src/WorkLinkClient.ts
index 5e157062d1838..fe5ebfa27a26e 100644
--- a/clients/client-worklink/src/WorkLinkClient.ts
+++ b/clients/client-worklink/src/WorkLinkClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -238,7 +239,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-workmail/src/WorkMailClient.ts b/clients/client-workmail/src/WorkMailClient.ts
index 375878787393c..ea8a45e61402c 100644
--- a/clients/client-workmail/src/WorkMailClient.ts
+++ b/clients/client-workmail/src/WorkMailClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -397,7 +398,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-workmailmessageflow/src/WorkMailMessageFlowClient.ts b/clients/client-workmailmessageflow/src/WorkMailMessageFlowClient.ts
index 6d627ab092e2a..d4cd681f23280 100644
--- a/clients/client-workmailmessageflow/src/WorkMailMessageFlowClient.ts
+++ b/clients/client-workmailmessageflow/src/WorkMailMessageFlowClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -87,7 +88,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-workspaces-web/src/WorkSpacesWebClient.ts b/clients/client-workspaces-web/src/WorkSpacesWebClient.ts
index 69db1e6f281ee..4d99c1a3778fc 100644
--- a/clients/client-workspaces-web/src/WorkSpacesWebClient.ts
+++ b/clients/client-workspaces-web/src/WorkSpacesWebClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -286,7 +287,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-workspaces/src/WorkSpacesClient.ts b/clients/client-workspaces/src/WorkSpacesClient.ts
index 2d2e83f457e59..7d55cb453cf9b 100644
--- a/clients/client-workspaces/src/WorkSpacesClient.ts
+++ b/clients/client-workspaces/src/WorkSpacesClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -367,7 +368,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/clients/client-xray/src/XRayClient.ts b/clients/client-xray/src/XRayClient.ts
index 9104dc229b500..b99eab7694911 100644
--- a/clients/client-xray/src/XRayClient.ts
+++ b/clients/client-xray/src/XRayClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -184,7 +185,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/private/aws-echo-service/src/EchoServiceClient.ts b/private/aws-echo-service/src/EchoServiceClient.ts
index 4bd3c847b1179..70415dd787875 100644
--- a/private/aws-echo-service/src/EchoServiceClient.ts
+++ b/private/aws-echo-service/src/EchoServiceClient.ts
@@ -30,6 +30,7 @@ import {
 } from "@aws-sdk/smithy-client";
 import {
   Provider,
+  BodyLengthCalculator as __BodyLengthCalculator,
   Decoder as __Decoder,
   Encoder as __Encoder,
   Hash as __Hash,
@@ -69,7 +70,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/private/aws-protocoltests-ec2/src/EC2ProtocolClient.ts b/private/aws-protocoltests-ec2/src/EC2ProtocolClient.ts
index 7efd274c792e0..47dc2eae54af8 100644
--- a/private/aws-protocoltests-ec2/src/EC2ProtocolClient.ts
+++ b/private/aws-protocoltests-ec2/src/EC2ProtocolClient.ts
@@ -29,6 +29,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Decoder as __Decoder,
   Encoder as __Encoder,
   Hash as __Hash,
@@ -153,7 +154,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/private/aws-protocoltests-json-10/src/JSONRPC10Client.ts b/private/aws-protocoltests-json-10/src/JSONRPC10Client.ts
index 750343a90eeae..6e82a134f8a76 100644
--- a/private/aws-protocoltests-json-10/src/JSONRPC10Client.ts
+++ b/private/aws-protocoltests-json-10/src/JSONRPC10Client.ts
@@ -29,6 +29,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Decoder as __Decoder,
   Encoder as __Encoder,
   Hash as __Hash,
@@ -111,7 +112,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/private/aws-protocoltests-json/src/JsonProtocolClient.ts b/private/aws-protocoltests-json/src/JsonProtocolClient.ts
index 47906d84f3272..53bcc66f4fdd0 100644
--- a/private/aws-protocoltests-json/src/JsonProtocolClient.ts
+++ b/private/aws-protocoltests-json/src/JsonProtocolClient.ts
@@ -35,6 +35,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Credentials as __Credentials,
   Decoder as __Decoder,
   Encoder as __Encoder,
@@ -133,7 +134,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/private/aws-protocoltests-query/src/QueryProtocolClient.ts b/private/aws-protocoltests-query/src/QueryProtocolClient.ts
index 5a03c4dc7dfb4..d0041b6acd697 100644
--- a/private/aws-protocoltests-query/src/QueryProtocolClient.ts
+++ b/private/aws-protocoltests-query/src/QueryProtocolClient.ts
@@ -29,6 +29,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Decoder as __Decoder,
   Encoder as __Encoder,
   Hash as __Hash,
@@ -183,7 +184,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/private/aws-protocoltests-restjson/src/RestJsonProtocolClient.ts b/private/aws-protocoltests-restjson/src/RestJsonProtocolClient.ts
index 9ea50773190b3..7990c6d542e2c 100644
--- a/private/aws-protocoltests-restjson/src/RestJsonProtocolClient.ts
+++ b/private/aws-protocoltests-restjson/src/RestJsonProtocolClient.ts
@@ -29,6 +29,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Decoder as __Decoder,
   Encoder as __Encoder,
   Hash as __Hash,
@@ -476,7 +477,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.
diff --git a/private/aws-protocoltests-restxml/src/RestXmlProtocolClient.ts b/private/aws-protocoltests-restxml/src/RestXmlProtocolClient.ts
index 7213f34cdac58..1f1c56586735b 100644
--- a/private/aws-protocoltests-restxml/src/RestXmlProtocolClient.ts
+++ b/private/aws-protocoltests-restxml/src/RestXmlProtocolClient.ts
@@ -29,6 +29,7 @@ import {
   SmithyResolvedConfiguration as __SmithyResolvedConfiguration,
 } from "@aws-sdk/smithy-client";
 import {
+  BodyLengthCalculator as __BodyLengthCalculator,
   Decoder as __Decoder,
   Encoder as __Encoder,
   Hash as __Hash,
@@ -315,7 +316,7 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * A function that can calculate the length of a request body.
    * @internal
    */
-  bodyLengthChecker?: (body: any) => number | undefined;
+  bodyLengthChecker?: __BodyLengthCalculator;
 
   /**
    * A function that converts a stream into an array of bytes.