code: function MucProxy(options) {
      this.service = options.service;
      this.helpers = options.helpers;
      this.connection = options.stropheClient;
      this.Client = options.xmppClient;
      this.nodeStanzasCallbacks = options.nodeStanzasCallbacks;
      //
      this.joinedRooms = {};
  }
docs: /* Chat module: Group Chat (Dialog)
  
  Multi-User Chat
  http://xmpp.org/extensions/xep-0045.html
  
  ----------------------------------------------------------------------------- 
  @namespace QB.chat.muc