protected function onOrderEmailToOwnerSent($user, $order)
    {
        // add user history
        $remark = oxNew(\OxidEsales\Eshop\Application\Model\Remark::class);
        $remark->oxremark__oxtext = new \OxidEsales\Eshop\Core\Field($this->getAltBody(), \OxidEsales\Eshop\Core\Field::T_RAW);
        $remark->oxremark__oxparentid = new \OxidEsales\Eshop\Core\Field($user->getId(), \OxidEsales\Eshop\Core\Field::T_RAW);
        $remark->oxremark__oxtype = new \OxidEsales\Eshop\Core\Field("o", \OxidEsales\Eshop\Core\Field::T_RAW);
        $remark->save();
    }