How to change field type in Symfony child form?

Question

symfony

I have a form that extends another form and I need to take a field from the parent form and change its type. What needs to be supplied as arguments to the setType method, the code is given below
$builder->get('locationSelector')->setType();

Answer 1

Just add a new field with the same name:

$builder->add('locationSelector', NewType::class, [
    // ...
]);