final protected function _toHtml() {
		$sess = df_checkout_session(); /** @var Session|DfSession $m */
		$m = $sess->getDfMessages(); /** @var array(array(string => bool|Phrase)) $m */
		$sess->unsDfMessages();
		return !$m ? '' : df_js(__CLASS__, 'messages', ['messages' => $m]);
	}