public function findLimited($limit = 0)
    {
        $queryBuilder = $this->createQueryBuilder('c')
            ->where('c.enabled = :enabled')
            ->orderBy('c.position')
            ->setParameters(array(
                'enabled' => true,
            ));

        if ($limit != 0) {
            $queryBuilder->setMaxResults($limit);
        }

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