DisplayOnlyDomainIconType.php

<?php

namespace Shopsys\FrameworkBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormView;
use Symfony\Component\OptionsResolver\OptionsResolver;

class DisplayOnlyDomainIconType extends AbstractType
{
    /**
     * @param \Symfony\Component\Form\FormView $view
     * @param \Symfony\Component\Form\FormInterface $form
     * @param array $options
     */
    public function buildView(FormView $view, FormInterface $form, array $options)
    {
        $view->vars['data'] = (int)$options['data'];
    }

    /**
     * @param \Symfony\Component\OptionsResolver\OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'mapped' => false,
            'required' => false,
        ]);
    }
}