groupedNamespace.php

<?php
namespace AppBundle\Form\Type;

use Symfony\Component\Form\AbstractType
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\Extension\Core\Type\{TextType, DateType, IntegerType, CheckboxType};
use Symfony\Bridge\Doctrine\Form\Type\EntityType;

class FoobarType extends AbstractType
{
	public function buildForm(FormBuilderInterface $builder, array $options)
	{
		$builder
			->add('name', TextType::class)
			->add('another', CheckboxType::class)
			->add('int', IntegerType::class)
			->add('bar', DateType::class)
			->add('foo', EntityType::class, [
				'class' => 'AppBundle:Foo',
			])
		;
	}
}