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

<p>This class is for advanced usage.
java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/stub/GrpcStorageTransferServiceCallableFactory.java