public static function removeInstanceFromSession($sListSessionKey)
    {
        if (isset($_SESSION[TdbShopArticleList::SESSIN_DUMP_NAME]) &&
            isset($_SESSION[TdbShopArticleList::SESSIN_DUMP_NAME][$sListSessionKey])) {
            unset($_SESSION[TdbShopArticleList::SESSIN_DUMP_NAME][$sListSessionKey]);
        }
    }