class SessionCsrfProvider extends

string|null getParent() Returns the name of the parent type.

class TrimListener implements

configureOptions(OptionsResolver

FormFactoryInterface getFormFactory()

array extractSubmittedData(FormInterface $form)

class AbstractType implements FormTypeInterface

string|null getParent() Returns the name of the parent type.

string getBlockPrefix() Returns the prefix of the template block name for this type.

array all() Returns the children. Return