protected function _setAutoGroups($sCountryId)
    {
        // assigning automatically to specific groups
        $blForeigner = true;
        $blForeignGroupExists = false;
        $blInlandGroupExists = false;

        $aHomeCountry = \OxidEsales\Eshop\Core\Registry::getConfig()->getConfigParam('aHomeCountry');
        // foreigner ?
        if (is_array($aHomeCountry)) {
            if (in_array($sCountryId, $aHomeCountry)) {
                $blForeigner = false;
            }
        } elseif ($sCountryId == $aHomeCountry) {
            $blForeigner = false;
        }

        if ($this->inGroup('oxidforeigncustomer')) {
            $blForeignGroupExists = true;
            if (!$blForeigner) {
                $this->removeFromGroup('oxidforeigncustomer');
            }
        }

        if ($this->inGroup('oxidnewcustomer')) {
            $blInlandGroupExists = true;
            if ($blForeigner) {
                $this->removeFromGroup('oxidnewcustomer');
            }
        }

        if (!$blForeignGroupExists && $blForeigner) {
            $this->addToGroup('oxidforeigncustomer');
        }
        if (!$blInlandGroupExists && !$blForeigner) {
            $this->addToGroup('oxidnewcustomer');
        }
    }