protected function _getProductParent($sParentId)
    {
        if ($this->_oProductParent === null ||
            ($this->_oProductParent !== false && $this->_oProductParent->getId() != $sParentId)
        ) {
            $this->_oProductParent = false;
            $oProduct = oxNew(\OxidEsales\Eshop\Application\Model\Article::class);
            if ($oProduct->load($sParentId)) {
                $this->_oProductParent = $oProduct;
            }
        }

        return $this->_oProductParent;
    }