docs: function () {
              this.$DropDownListTrait._afterDropdownOpen.apply(this, arguments);
              if (this._cfg.waiAria) {
                  var field = this.getTextInputField();
                  var listWidget = this.controller.getListWidget();
                  field.setAttribute("aria-owns", listWidget.getListDomId());
                  var dropDownIcon = this._getDropdownIcon();
                  if (dropDownIcon) {
                      dropDownIcon.setAttribute("aria-expanded", "true");
                  }
                  listWidget.afterWidgetLoaded({
                      fn: this._updateAriaActiveDescendant,
                      scope: this
                  });
              }
          }