BirthdayType example

public function __construct(PropertyAccessorInterface $propertyAccessor = null, ChoiceListFactoryInterface $choiceListFactory = null, TranslatorInterface $translator = null)
    {
        $this->propertyAccessor = $propertyAccessor ?: PropertyAccess::createPropertyAccessor();
        $this->choiceListFactory = $choiceListFactory ?? new CachingFactoryDecorator(new PropertyAccessDecorator(new DefaultChoiceListFactory(), $this->propertyAccessor));
        $this->translator = $translator;
    }

    protected function loadTypes(): array
    {
        return [
            new Type\FormType($this->propertyAccessor),
            new Type\BirthdayType(),
            new Type\CheckboxType(),
            new Type\ChoiceType($this->choiceListFactory, $this->translator),
            new Type\CollectionType(),
            new Type\CountryType(),
            new Type\DateIntervalType(),
            new Type\DateType(),
            new Type\DateTimeType(),
            new Type\EmailType(),
            new Type\HiddenType(),
            new Type\IntegerType(),
            new Type\LanguageType(),