code: void checkMessageTopic(UserContext ctx, String topic, Object payload, JsTopicMessageController msgControl) throws NotRecipientException {
  		if (null != msgControl) {
  			msgControl.checkRight(ctx, topic, payload);
  		}
  	}
docs: Check if message is granted by messageControl
  
  @param ctx
  @param mtc
  @param msgControl
  @return
  @throws NotRecipientException