public function getCustomListDisplayType()
    {
        if ($this->_sCustomListDisplayType == null) {
            $this->_sCustomListDisplayType = \OxidEsales\Eshop\Core\Registry::getConfig()->getRequestParameter('ldtype');

            if (!$this->_sCustomListDisplayType) {
                $this->_sCustomListDisplayType = \OxidEsales\Eshop\Core\Registry::getSession()->getVariable('ldtype');
            }
        }

        return $this->_sCustomListDisplayType;
    }