protected function _getArticleBundles($oBasketItem)
    {
        $aBundles = [];

        if ($oBasketItem->isBundle()) {
            return $aBundles;
        }

        $oArticle = $oBasketItem->getArticle(true);
        if ($oArticle && $oArticle->oxarticles__oxbundleid->value) {
            $aBundles[$oArticle->oxarticles__oxbundleid->value] = 1;
        }

        return $aBundles;
    }