public function actionDelete()
 {
     $permission = YumPermission::model()->findByPk($_GET['id']);
     if ($permission->delete()) {
         Yum::setFlash(Yum::t('The permission has been removed'));
     } else {
         Yum::setFlash(Yum::t('Error while removing the permission'));
     }
     $this->redirect(array('//role/permission/admin'));
 }