docs: function (event) {
  
              if (!this.$) {
                  return;
              }
  
              for (var i = 0; i < this.$.fnc._attributes.length; i++) {
                  if (event.$.hasOwnProperty(this.$.fnc._attributes[i])) {
                      this._callback();
                      return;
                  }
              }
          }