public function getOrderArticleList()
    {
        if ($this->_aArticlesList === null) {
            // marking as set
            $this->_aArticlesList = false;
            $oOrdersList = $this->getOrderList();
            if ($oOrdersList && $oOrdersList->count()) {
                $this->_aArticlesList = oxNew(\OxidEsales\Eshop\Application\Model\ArticleList::class);
                $this->_aArticlesList->loadOrderArticles($oOrdersList);
            }
        }

        return $this->_aArticlesList;
    }