Frontend\Core\Engine\FormExtension::__construct PHP Метод

    public function __construct($twig)
    {
        $this->twig = $twig;
        // option only on forms
        $this->twig->addTokenParser(new FormTokenParser());
        $this->twig->addTokenParser(new FormEndTokenParser());
        $this->twig->addTokenParser(new FormFieldTokenParser());
        $this->twig->addTokenParser(new FormFieldErrorTokenParser());
        $this->twig->addTokenParser(new SeoFormTokenParser());
    }