public function addPromotionGroup()
    {
        $aChosenGroup = $this->_getActionIds('oxgroups.oxid');
        $soxId = \OxidEsales\Eshop\Core\Registry::getConfig()->getRequestParameter('synchoxid');

        if (\OxidEsales\Eshop\Core\Registry::getConfig()->getRequestParameter('all')) {
            $sGroupTable = $this->_getViewName('oxgroups');
            $aChosenGroup = $this->_getAll($this->_addFilter("select $sGroupTable.oxid " . $this->_getQuery()));
        }

        $promotionAdded = false;
        if ($soxId && $soxId != "-1" && is_array($aChosenGroup)) {
            foreach ($aChosenGroup as $sChosenGroup) {
                $oObject2Promotion = oxNew(\OxidEsales\Eshop\Core\Model\BaseModel::class);
                $oObject2Promotion->init('oxobject2action');
                $oObject2Promotion->oxobject2action__oxactionid = new \OxidEsales\Eshop\Core\Field($soxId);
                $oObject2Promotion->oxobject2action__oxobjectid = new \OxidEsales\Eshop\Core\Field($sChosenGroup);
                $oObject2Promotion->oxobject2action__oxclass = new \OxidEsales\Eshop\Core\Field("oxgroups");
                $oObject2Promotion->save();
            }

            $promotionAdded = true;
        }

        return $promotionAdded;
    }