code: func (payloadHandler *payloadRequestHandler) handlerFunc() func(payload *ecsacs.PayloadMessage) {
  	// return a function that just enqueues PayloadMessages into the message buffer
  	return func(payload *ecsacs.PayloadMessage) {
  		payloadHandler.messageBuffer <- payload
  	}
  }
docs: // handlerFunc returns the request handler function for the ecsacs.PayloadMessage type