Eccube\Form\Type\Front\ForgotType::buildForm PHP Method

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('login_email', 'text', array('attr' => array('max_length' => 320), 'constraints' => array(new Assert\NotBlank(), new Assert\Email(array('strict' => true)))));
    }