public function getDeliverySetList($oUser, $sCountryId, $sDelSet = null)
    {
        $this->_getList($oUser, $sCountryId);

        // if there is already chosen delivery set we must start checking from it
        $aList = $this->_aArray;
        if ($sDelSet && isset($aList[$sDelSet])) {
            //set it as first element
            $oDelSet = $aList[$sDelSet];
            unset($aList[$sDelSet]);

            $aList = array_merge([$sDelSet => $oDelSet], $aList);
        }

        return $aList;
    }