public function isStarred($u = false)
    {
        if (!$u) {
            $u = new User();
        }
        $db = Loader::db();
        $r = $db->GetOne(
            'select fsfID from FileSetFiles fsf inner join FileSets fs on fs.fsID = fsf.fsID where fsf.fID = ? and fs.uID = ? and fs.fsType = ?',
            [$this->getFileID(), $u->getUserID(), FileSet::TYPE_STARRED]
        );

        return $r > 0;
    }