/**
* Adds a CSRF field to the root form view.
*
* @param FormView $view The form view
* @param FormInterface $form The form
* @param array $options The options
*/
public function finishView(FormView $view, FormInterface $form, array $options)
{
if (!$view->parent && $options['compound']) {
$token = $this->session->token();
$factory = $form->getConfig()->getFormFactory();
$csrfForm = $factory->createNamed('_token', 'hidden', $token, array('mapped' => false));
$view->children['_token'] = $csrfForm->createView(null);
}
}