addTypeGuessers example

abstract class FormIntegrationTestCase extends TestCase
{
    protected FormFactoryInterface $factory;

    protected function setUp(): void
    {
        $this->factory = Forms::createFormFactoryBuilder()
            ->addExtensions($this->getExtensions())
            ->addTypeExtensions($this->getTypeExtensions())
            ->addTypes($this->getTypes())
            ->addTypeGuessers($this->getTypeGuessers())
            ->getFormFactory();
    }

    protected function getExtensions()
    {
        return [];
    }

    protected function getTypeExtensions()
    {
        return [];
    }