public function getTwigNodeTree($markup = false)
    {
        $loader = new TwigLoader();
        $twig = new Twig_Environment($loader, []);
        $twig->addExtension(new CmsTwigExtension());
        $twig->addExtension(new SystemTwigExtension);

        $stream = $twig->tokenize(new Twig_Source($markup === false ? $this->markup : $markup, 'getTwigNodeTree'));
        return $twig->parse($stream);
    }