import 'dart:async';

Class returnClass() async => new Class();
Class returnClassFromDynamic() async => returnDynamic();
Class returnClassFromFutureClass() async => returnFutureClass();
Class returnClassFromFutureOrClass() async => returnFutureOrClass();
Future<Class> returnFutureClass() async => new Class();
Future<Class> returnFutureClassDynamic() async => returnDynamic();
Future<Class> returnFutureClassFromFutureClass() async => returnFutureClass();
Future<Class> returnFutureClassFromFutureOrClass() async =>
    returnFutureOrClass();
FutureOr<Class> returnFutureOrClass() async => new Class();
FutureOr<Class> returnFutureOrClassDynamic() async => returnDynamic();
FutureOr<Class> returnFutureOrClassFromFutureClass() async =>
    returnFutureClass();
FutureOr<Class> returnFutureOrClassFromFutureOrClass() async =>
    returnFutureOrClass();

class Class {}

dynamic returnDynamic() => new Class();
main() async {}