public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('code', 'text', ['attr' => ['placeholder' => 'Do not use special characters'], 'label' => 'lang.code'])->add('name', 'text', ['label' => 'lang.name'])->add('rtl', 'checkbox', ['label' => 'lang.rtl', 'required' => false]);
}