## Feature Description Add new action mUpsert which allows you to make multiple "create or update" action in a single request See the server implementation [here](https://github.com/kuzzleio/kuzzle/pull/2027) released in 2.11.0, you can access this action with the [query](https://docs.kuzzle.io/sdk/js/7/core-classes/kuzzle/query/#_Core_Classes_Kuzzle_query) method in the meantime
