public function emptyTrash()
    {
        $this->loadModel('Comment.Comments');
        $this->Comments->deleteAll(['Comments.status' => 'trash', 'Comments.table_alias' => $this->_manageTable]);
        $this->Flash->success(__d('comment', 'All comments in trash were successfully removed!'));
        $this->title(__d('comment', 'Empty Trash'));
        $this->redirect($this->referer());
    }