trinity-cms-bundles/src/Trinity/Bundle/UserBundle/Form/Type/UserLogBatchType.php

<?php

namespace Trinity\Bundle\UserBundle\Form\Type;

use Symfony\Component\Form\FormBuilderInterface;
use Trinity\Bundle\AdminBundle\Form\Type\BatchType as BaseBatchType;

class UserLogBatchType extends BaseBatchType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add(
            'objects',
            'choice',
            array(
                'required' => true,
                'multiple' => true,
                'expanded' => true,
            )
        );

        $builder->add(
            'action',
            'choice',
            array(
                'required' => true,
                'choices'  => array(
                    self::BATCH_REMOVE => 'Remove',
                ),
                'multiple' => false,
            )
        );
    }

}