public function getDirectFrontNames()
    {
        if (is_null($this->_directFrontNames)) {
            $names = Mage::getConfig()->getNode(self::XML_NODE_DIRECT_FRONT_NAMES);
            if ($names) {
                $this->_directFrontNames = $names->asArray();
            } else {
                return [];
            }
        }
        return $this->_directFrontNames;
    }