Xpressengine\Menu\MenuHandler::menuKeyString PHP Method

    protected function menuKeyString($value)
    {
        if ($value instanceof MenuItem) {
            $string = $value->menu->getKey() . '.' . implode('.', $value->getBreadcrumbs());
        } else {
            $string = $value;
        }
        return $this->menuKeyword . '.' . $string;
    }