onFieldsUnregistered method
Implementation
@override
void onFieldsUnregistered(
FormeState form, List<FormeFieldState<dynamic>> fields) {
final Iterable<FormeFieldState<dynamic>> iterable =
fields.where((element) => element.name == widget.name);
if (iterable.isNotEmpty) {
onUnregistered(form, iterable.first as FormeFieldState<E>);
}
}