expose OBX_bytes_wrapper.managedCopyOf() align parameter

Author: Ivan Dlugos

lib/src/bindings/flatbuffers.dart

@@ -107,7 +107,8 @@ class OBXFlatbuffersManager<T> {
     });
 
     var endOffset = builder.endTable();
-    return OBX_bytes_wrapper.managedCopyOf(builder.finish(endOffset));
+    return OBX_bytes_wrapper.managedCopyOf(builder.finish(endOffset),
+        align: true);
   }
 
   T unmarshal(Pointer<Uint8> dataPtr, int length) {

lib/src/bindings/structs.dart

@@ -49,12 +49,11 @@ class OBX_bytes_wrapper {
 
   /// Returns a pointer to OBX_bytes with copy of the passed data.
   /// Warning: this creates two unmanaged pointers which must be freed manually: OBX_bytes.freeManaged(result).
-  OBX_bytes_wrapper.managedCopyOf(Uint8List data)
+  /// ObjectBox requires object data to be aligned to the length of 4.
+  OBX_bytes_wrapper.managedCopyOf(Uint8List data, {/*required*/ bool align})
       : _cBytes = allocate<OBX_bytes>() {
     final bytes = _cBytes.ref;
 
-    // ObjectBox requires data to be aligned to the length of 4
-    const align = true;
     bytes.size = align ? ((data.length + 3.0) ~/ 4.0) * 4 : data.length;
 
     // NOTE: currently there's no way to get access to the underlying memory of Uint8List to avoid a copy.

lib/src/sync.dart

@@ -135,7 +135,7 @@ class SyncClient {
   /// Configure authentication credentials.
   /// The accepted [SyncCredentials] type depends on your sync-server configuration.
   void setCredentials(SyncCredentials creds) {
-    final cCreds = OBX_bytes_wrapper.managedCopyOf(creds._data);
+    final cCreds = OBX_bytes_wrapper.managedCopyOf(creds._data, align: false);
     try {
       checkObx(bindings.obx_sync_credentials(
           ptr,