@Override
  public <RequestT, ResponseT, MetadataT>
      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
          GrpcCallSettings<RequestT, Operation> grpcCallSettings,
          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
          ClientContext clientContext,
          OperationsStub operationsStub) {
    return GrpcCallableFactory.createOperationCallable(
        grpcCallSettings, callSettings, clientContext, operationsStub);
  }
gRPC callable factory implementation for the VideoIntelligenceService service API.

<p>This class is for advanced usage.
java-video-intelligence/google-cloud-video-intelligence/src/main/java/com/google/cloud/videointelligence/v1p1beta1/stub/GrpcVideoIntelligenceServiceCallableFactory.java