private function deleteMultiAction()
 {
     if (!current_user_can('wpProQuiz_delete_quiz')) {
         wp_die(__('You do not have sufficient permissions to access this page.'));
     }
     $m = new WpProQuiz_Model_QuizMapper();
     if (!empty($_POST['ids'])) {
         foreach ($_POST['ids'] as $id) {
             $m->deleteAll($id);
         }
     }
     WpProQuiz_View_View::admin_notices(__('Quiz deleted', 'wp-pro-quiz'), 'info');
     $this->showAction();
 }