public function getFormId(FormInterface $form)
    {
        if (is_object($form->getData())) {
            $ret = preg_replace('/\W/', '_', get_class($form->getData()));
        } else {
            if ($form->getName()) {
                return (string)$form->getName();
            } else {
                return preg_replace('/\W/', '_', get_class($form));
            }
        }
        return $ret;
    }