Question from the Symfony 3 test

The following method is not part of the FormTypeInterface interface.

setDefaultOptions(...);

The following event can be used to modify the submitted data.

form.pre_set_data (CONST FormEvents::PRE_SET_DATA)

In a controller, the following method takes a FormTypeInterface object as its first argument.

 $this->createForm();

After processing a form by the following method, the submitted data is accessible by the getData() method.

 $form->handleRequest($request);