code: public Observable<OperationStatus> updateCompositeEntityAsync(UUID appId, String versionId, UUID cEntityId, CompositeEntityModel compositeModelUpdateObject) {
          return updateCompositeEntityWithServiceResponseAsync(appId, versionId, cEntityId, compositeModelUpdateObject).map(new Func1<ServiceResponse<OperationStatus>, OperationStatus>() {
              @Override
              public OperationStatus call(ServiceResponse<OperationStatus> response) {
                  return response.body();
              }
          });
      }
docs: Updates the composite entity extractor.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param cEntityId The composite entity extractor ID.
  @param compositeModelUpdateObject A model object containing the new entity extractor name and children.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the OperationStatus object