public function findAllRootPages()
    {
        $queryBuilder = $this->getQueryBuilder();

        $queryBuilder
            ->select('uid', 'title')
            ->from($this->table)
            ->where(
                $queryBuilder->expr()->neq('pid', -1),
                $queryBuilder->expr()->eq('is_siteroot', 1)
            );


        $this->addDefaultLanguageUidConstraint($queryBuilder);

        return $queryBuilder->execute()->fetchAll();
    }