private function getSaleOrderData($saleId)
    {
        /* get referral customer ID */
        $entity = $this->daoGeneric->getEntityByPk(
            Cfg::ENTITY_MAGE_SALES_ORDER,
            [Cfg::E_COMMON_A_ENTITY_ID => $saleId],
            [Cfg::E_SALE_ORDER_A_CUSTOMER_ID, Cfg::E_SALE_ORDER_A_INCREMENT_ID]
        );
        $custId = $entity[Cfg::E_SALE_ORDER_A_CUSTOMER_ID];
        $incId = $entity[Cfg::E_SALE_ORDER_A_INCREMENT_ID];
        return [$custId, $incId];
    }