code: func ReliableRPCWithOptions(
  	routeStr string,
  	metadata map[string]interface{},
  	reply, arg proto.Message,
  	opts *worker.EnqueueOpts,
  ) (jid string, err error) {
  	return app.worker.EnqueueRPCWithOptions(routeStr, metadata, reply, arg, opts)
  }
docs: // ReliableRPCWithOptions enqueues RPC to worker
  // Receive worker options for this specific RPC