how fix 'select2' ('destroy') about ui-select2 HOT 4 OPEN

   elm.bind("$destroy", function () {
      if (elm.hasClass('.select2-offscreen')) {
        elm.select2("destroy");
      }
    });
   attrs.$observe('disabled', function (value) {
      if (elm.hasClass('.select2-offscreen')) {
        elm.select2('enable', !value);
      }
    });

    attrs.$observe('readonly', function (value) {
      if (elm.hasClass('.select2-offscreen')) {
        elm.select2('readonly', !!value);
      }
    });