static public function getID(): string
    {
        if (!isset(self::$cache['id'])) {
            $cookies = Internal\Cookies::getList(Internal\Cookies::TYPE_SERVER);
            self::$cache['id'] = isset($cookies['tmpr']) ? $cookies['tmpr'] : Internal\Themes::getActiveThemeID();
        }
        return self::$cache['id'];
    }