public function getActiveThemeId()
    {
        $sCustTheme = \OxidEsales\Eshop\Core\Registry::getConfig()->getConfigParam('sCustomTheme');
        if ($sCustTheme) {
            return $sCustTheme;
        }

        return \OxidEsales\Eshop\Core\Registry::getConfig()->getConfigParam('sTheme');
    }