docs: function (cfg, ctxt, lineNumber, controllerInstance) {
          var controller = controllerInstance || new ariaWidgetsControllersMultiAutoCompleteController();
  
          this.$AutoComplete.constructor.call(this, cfg, ctxt, lineNumber, controller);
          if (!cfg.expandButton) {
              this._hideIconNames = ["dropdown"];
          }
          controller.maxOptions = cfg.maxOptions;
  
          /**
           * Whether the width of the popup can be smaller than the field, when configured to be so. If false, the
           * popupWidth property will be overridden when it is smaller than the field width
           * @type Boolean
           * @protected
           */
          this._freePopupWidth = true;
      }