protected function loadRawOrder($tmpSubTier)
    {
        $nID = $tmpSubTier[0];
        $this->nodesRawIndex[$nID] = sizeof($this->nodesRawOrder);
        $this->nodesRawOrder[] = $nID;
        if (sizeof($tmpSubTier[1]) > 0) {
            foreach ($tmpSubTier[1] as $deeper) {
                $this->loadRawOrder($deeper);
            }
        }
        return true;
    }