public function findOrderedToolsLockedByAdmin($orderedToolType = 0)
    {
        $dql = "
            SELECT ot
            FROM Claroline\CoreBundle\Entity\Tool\OrderedTool ot
            JOIN ot.tool t
            WHERE ot.user IS NULL
            AND ot.workspace IS NULL
            AND ot.type = :type
            AND ot.locked = true
            AND t.isDisplayableInDesktop = true
            ORDER BY ot.order
        ";
        $query = $this->_em->createQuery($dql);
        $query->setParameter('type', $orderedToolType);

        return $query->getResult();
    }