code: function PrivacyListProxy(options) {
      this.service = options.service;
      this.helpers = options.helpers;
      this.connection = options.stropheClient;
      this.Client = options.xmppClient;
      this.nodeStanzasCallbacks = options.nodeStanzasCallbacks;
  }
docs: /* Chat module: Privacy list
  
  Privacy list
  http://xmpp.org/extensions/xep-0016.html
  by default 'mutualBlock' is work in one side
  -----------------------------------------------------------------------------