public function getCustomers()
    {
        $aCustomersConf = \OxidEsales\Eshop\Core\Registry::getConfig()->getShopConfVar("aRDFaCustomers");
        if (isset($aCustomersConf)) {
            foreach ($this->_aCustomers as $sCustomer => $iValue) {
                $aCustomers[$sCustomer] = (in_array($sCustomer, $aCustomersConf)) ? 1 : 0;
            }
        } else {
            $aCustomers = [];
        }

        return $aCustomers;
    }