[TomasVotruba]

Form event subscribers (FormEvents::*) are usually registered manually on a form builder, not as a global listener. Converting them to #[AsEventListener] would change behavior, so skip any getSubscribedEvents whose event key references Symfony\Component\Form\FormEvents.

public static function getSubscribedEvents(): array
{
    return [
        FormEvents::PRE_SUBMIT => 'preSubmitData',
    ];
}

Note: whole class is skipped when any Form event key is present, to avoid half-converting a subscriber.