Bootstrap\View\Helper\BootstrapPanelHelper::end PHP Метод

    public function end($title = null, $options = [])
    {
        $this->_lastPanelClosed = true;
        $res = '';
        $res .= $this->_cleanCurrent();
        if ($title !== null) {
            $res .= $this->footer($title, $options);
        }
        $res .= '</div>';
        return $res;
    }