protected function _getUrlFromMeta()
    {
        $url = ObjectUtility::valueForKeyPathOfObject('meta.url', $this);
        if (!$url) {
            return null;
        }
        if (substr($url, 0, 11) === '/Resources/') {
            return $url;
        }
        if (substr($url, 0, 10) === 'Resources/') {
            return $url;
        }
        if (strpos($url, '://') === false) {
            $url = 'http://' . $url;
        }

        return $url;
    }