code: function Plugin(option) {
      return this.each(function () {
        var $this = $(this);
        var data  = $this.data(DataKey);
  
        if (!data) {
          $this.data(DataKey, (data = new DirectChat($this)));
        }
  
        if (typeof option == 'string') data.toggle($this);
      });
    }
docs: Plugin Definition =================