main.dart

import 'package:bloc/bloc.dart';

class _Cubit extends Cubit<int> {
  _Cubit() : super(0);
}

final _foo = Foo(() => _Cubit());

typedef CubitFactory<T extends Cubit<R>, R> = T Function();

class Foo<T extends Cubit<R>, R> {
  Foo(
    CubitFactory<T, R> fn,
  ) {}
}


void main() {
  print(_foo.runtimeType);
}