import 'messages_with_types_opt_out.dart';

class SubInIn extends SuperIn {
  String nonNullableSame() => "bar";
  String? nullableSame() => "foo";
  T nonNullableBad<T>(T t) => t;
  T? nullableBad<T>(T t) => null;
}

class SubOutIn extends SuperOut {
  String nonNullableSame() => "bar";
  String? nullableSame() => "foo";
  T nonNullableBad<T>(T t) => t;
  T? nullableBad<T>(T t) => null;
}

class SuperIn {
  String nonNullableSame() => "bar";
  String? nullableSame() => "foo";
  int nonNullableBad<T>(T t) => 2;
  int? nullableBad<T>(T t) => 1;
}

double nonNullableVar = 4.0;
int Function()? nullableVar = () => 3;
testOptIn() {}