function Render()
    {
        self::$currentPage = $this->page;
        self::$Title = self::$currentPage->GetTitle();
        self::$Description = self::$currentPage->GetDescription();
        self::$Keywords = self::$currentPage->GetKeywords();
        if ($this->page->GetType() == (string)PageType::NotFound())
        {
            header('HTTP/1.0 404 Not Found');
        }
        else if ($this->page->GetType() !== (string)PageType::Normal())
        {
            throw new \Exception('Internal phine error: not normal page called');
        }
        ob_start();
        require PathUtil::LayoutTemplate($this->layout);
        $result = ob_get_clean();
        $replacer = new Replacer();
        return $replacer->RealizeVariables($result);
    }