public static function isMountpointInRootLine($uid = null)
    {
        $ret = false;

        // Performance check, there must be an MP-GET value
        if (Typo3GeneralUtility::_GET('MP')) {
            // Possible mount point detected, let's check the rootline
            foreach (self::getRootLine($uid) as $page) {
                if (!empty($page['_MOUNT_OL'])) {
                    // Mountpoint detected in rootline
                    $ret = true;
                }
            }
        }

        return $ret;
    }