Pimcore\Model\Asset\Dao::isLocked PHP Method

    public function isLocked()
    {
        // check for an locked element below this element
        $belowLocks = $this->db->fetchOne("SELECT tree_locks.id FROM tree_locks INNER JOIN assets ON tree_locks.id = assets.id WHERE assets.path LIKE ? AND tree_locks.type = 'asset' AND tree_locks.locked IS NOT NULL AND tree_locks.locked != '' LIMIT 1", $this->model->getRealFullPath() . "/%");
        if ($belowLocks > 0) {
            return true;
        }
        $parentIds = $this->getParentIds();
        $inhertitedLocks = $this->db->fetchOne("SELECT id FROM tree_locks WHERE id IN (" . implode(",", $parentIds) . ") AND type='asset' AND locked = 'propagate' LIMIT 1");
        if ($inhertitedLocks > 0) {
            return true;
        }
        return false;
    }