public function queueForDuplicationSort($a, $b)
    {
        if ($a['level'] > $b['level']) {
            return 1;
        }
        if ($a['level'] < $b['level']) {
            return -1;
        }
        if ($a['cDisplayOrder'] > $b['cDisplayOrder']) {
            return 1;
        }
        if ($a['cDisplayOrder'] < $b['cDisplayOrder']) {
            return -1;
        }
        if ($a['cID'] > $b['cID']) {
            return 1;
        }
        if ($a['cID'] < $b['cID']) {
            return -1;
        }

        return 0;
    }