public function getVoucherList()
    {
        $oVoucherList = oxNew(\OxidEsales\Eshop\Application\Model\VoucherList::class);
        $sSelect = 'select * from oxvouchers where oxvoucherserieid = ' . \OxidEsales\Eshop\Core\DatabaseProvider::getDb()->quote($this->getId());
        $oVoucherList->selectString($sSelect);

        return $oVoucherList;
    }