setDataLocked example

        $form = $this->getBuilder()
            ->setCompound(true)
            ->setDataMapper($mapper)
            ->addViewTransformer(new FixedDataTransformer([
                '' => '',
                'foo' => $viewData,
            ]))
            ->getForm();

        $form->add($child1 = $this->getBuilder('firstName')->getForm());
        $form->add($child2 = $this->getBuilder('lastName')->setData('Potencier')->setDataLocked(true)->getForm());

        $form->setData('foo');

        $this->assertSame('Fabien', $form->get('firstName')->getData());
        $this->assertSame('Potencier', $form->get('lastName')->getData());
    }

    public function testSubmitSupportsDynamicAdditionAndRemovalOfChildren()
    {
        $form = $this->form;

        

$builder
            ->setRequired($options['required'])
            ->setErrorBubbling($options['error_bubbling'])
            ->setEmptyData($options['empty_data'])
            ->setPropertyPath($options['property_path'])
            ->setMapped($options['mapped'])
            ->setByReference($options['by_reference'])
            ->setInheritData($options['inherit_data'])
            ->setCompound($options['compound'])
            ->setData($isDataOptionSet ? $options['data'] : null)
            ->setDataLocked($isDataOptionSet)
            ->setDataMapper($options['compound'] ? $this->dataMapper : null)
            ->setMethod($options['method'])
            ->setAction($options['action']);

        if ($options['trim']) {
            $builder->addEventSubscriber(new TrimListener());
        }

        $builder->setIsEmptyCallback($options['is_empty_callback']);
    }

    

$form->setData(null);

        $this->assertNull($form->getData());
        $this->assertNull($form->getNormData());
        $this->assertSame('', $form->getViewData());
    }

    public function testSetDataIsIgnoredIfDataIsLocked()
    {
        $form = $this->getBuilder()
            ->setData('default')
            ->setDataLocked(true)
            ->getForm();

        $form->setData('foobar');

        $this->assertSame('default', $form->getData());
    }

    public function testPreSetDataChangesDataIfDataIsLocked()
    {
        $config = new FormConfigBuilder('name', null, new EventDispatcher());
        $config