code: function handleIncoming(packet) {
  	var proceed = true
  		, data = packet.data;
  
  	// Check if message contains PrimusResponder envelope
  	if(data.plugin && data.plugin === 'primus-responder') {
  		proceed = false;
  
  		// Check if it is a request or a response and dispatch
  		if(data.requestId) {
  			dispatchRequest.call(this, data.requestId, data.data);
  		} else if(data.responseId) {
  			dispatchResponse.call(this, data.responseId, data.data);
  		}
  	}
  
  	return proceed;
  }
docs: PrivateFunction: handleIncoming
  A Primus transformer for incoming messages. As soon as a PrimusResponder
  related envelope is detected, the contained data is dispatched using
  `dispatchRequest` or `dispatchResponse`.
  
  Parameters:
  (Object) message - Incoming message