@Override
  public BidiStreamingCallable<StreamingPredictRequest, StreamingPredictResponse>
      streamingPredictCallable() {
    return streamingPredictCallable;
  }
Constructs an instance of GrpcPredictionServiceStub, using the given settings. This is
protected so that it is easy to make a subclass, but otherwise, the static factory methods
should be preferred.
java-vertexai/google-cloud-vertexai/src/main/java/com/google/cloud/vertexai/api/stub/GrpcPredictionServiceStub.java