code: public Observable<List<PrebuiltEntityExtractor>> addPrebuiltAsync(UUID appId, String versionId, List<String> prebuiltExtractorNames) {
          return addPrebuiltWithServiceResponseAsync(appId, versionId, prebuiltExtractorNames).map(new Func1<ServiceResponse<List<PrebuiltEntityExtractor>>, List<PrebuiltEntityExtractor>>() {
              @Override
              public List<PrebuiltEntityExtractor> call(ServiceResponse<List<PrebuiltEntityExtractor>> response) {
                  return response.body();
              }
          });
      }
docs: Adds a list of prebuilt entity extractors to the application.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param prebuiltExtractorNames An array of prebuilt entity extractor names.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the List&lt;PrebuiltEntityExtractor&gt; object