public function getCustomerAlsoBoughtThisProducts()
    {
        // Performance
        $myConfig = \OxidEsales\Eshop\Core\Registry::getConfig();
        if (!$myConfig->getConfigParam('bl_perfLoadCustomerWhoBoughtThis')) {
            return;
        }

        // selecting products that fits
        $sQ = $this->_generateSearchStrForCustomerBought();

        $oArticles = oxNew(\OxidEsales\Eshop\Application\Model\ArticleList::class);
        $oArticles->setSqlLimit(0, $myConfig->getConfigParam('iNrofCustomerWhoArticles'));
        $oArticles->selectString($sQ);
        if ($oArticles->count()) {
            return $oArticles;
        }
    }