public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('title', 'text', array('required' => true, 'constraints' => array(new Assert\NotBlank(), new Assert\Length(array('max' => 60))), 'error_bubbling' => true));
$builder->add('locale', null, array('required' => false, 'constraints' => array(new Assert\Length(array('max' => 5))), 'error_bubbling' => true));
$builder->add('description', 'textarea', array('required' => false));
$builder->add('parent', null, array('required' => false));
}