@Override
  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
      BatchingCallSettings<RequestT, ResponseT> callSettings,
      ClientContext clientContext) {
    return GrpcCallableFactory.createBatchingCallable(
        grpcCallSettings, callSettings, clientContext);
  }
gRPC callable factory implementation for the ImageAnnotator service API.

<p>This class is for advanced usage.
java-vision/google-cloud-vision/src/main/java/com/google/cloud/vision/v1p4beta1/stub/GrpcImageAnnotatorCallableFactory.java