docs: function(name, callback, context) {
      if (eventsApi(this, 'replyOnce', name, [callback, context])) {
        return this;
      }
  
      var self = this;
  
      var once = _.once(function() {
        self.stopReplying(name);
        return makeCallback(callback).apply(this, arguments);
      });
  
      return this.reply(name, once, context);
    }