public function findReservedSchacHomeOrganizations()
    {
        $queryBuilder = $this->idpRepository
            ->createQueryBuilder('role')
            ->select('role.schacHomeOrganization')
            ->distinct()
            ->orderBy('role.schacHomeOrganization');

        $this->compositeFilter->toQueryBuilder($queryBuilder, $this->idpRepository->getClassName());

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