public function findById($id)
{
try {
$queryBuilder = $this->createQueryBuilder('conditionGroup')->andWhere('conditionGroup.id = :conditionGroupId')->addSelect('conditions')->leftJoin('conditionGroup.conditions', 'conditions')->setParameter('conditionGroupId', $id);
return $queryBuilder->getQuery()->getSingleResult();
} catch (NoResultException $exc) {
return;
}
}