Menu\Items\ItemList::getItemsAtDepthRange PHP 메소드

    public function getItemsAtDepthRange($from, $to)
    {
        $itemsWithDepth = $this->getItemsWithDepth();
        $results = array();
        foreach ($itemsWithDepth as $depth => $items) {
            if ($depth >= $from && $depth <= $to) {
                foreach ($items as $item) {
                    $results[] = $item;
                }
            }
        }
        return new MenuHandler($results);
    }