private function IsTrail()
    {
        $pageItem = $this->naviItem->GetPageItem();
        if (!$pageItem)
        {
            return false;
        }
        $parent = PageRenderer::Page()->GetParent();
        $itemPage = $pageItem->GetPage();
        while ($parent)
        {
            if ($itemPage->Equals($parent))
            {
                return true;
            }
            $parent = $parent->GetParent();
        }
        return false;
    }