/**
     * create template
     *
     * @param string $class|NULL
     */
    protected function createTemplate($class = NULL)
    {
        // inicializace
        $texy = new Texy();
        $texy->encoding = 'utf-8';
        $texy->allowedTags = Texy::ALL;
        $texy->allowedStyles = Texy::ALL;
        $texy->setOutputMode(Texy::HTML5);

        // registrace filtru
        $template = parent::createTemplate($class);
        $template->registerHelper('texy', callback($texy, 'process'));
        $template->registerHelper('timeAgoInWords', 'CIS\Templates\Helpers::timeAgoInWords');
        $template->setTranslator($this->translator);

        $template->lang = $this->getLang();
        $template->parameters = $this->parameters;

        return $template;
    }