| import 'dart:async' show FutureOr; | 
 | import 'dart:collection' show LinkedHashMap, LinkedHashSet; | 
 |  | 
 | Future<Iterable<int>> iterablefun() async => {}; | 
 | Future<LinkedHashMap<int, bool>> lhmfun() async => {}; | 
 | Future<LinkedHashSet<int>> lhsfun() async => {}; | 
 | Future<Map<int, bool>> mapfun() async => {}; | 
 | Future<Set<int>> setfun() async => {}; | 
 | FutureOr<Iterable<int>> iterablefun2() => {}; | 
 | FutureOr<LinkedHashMap<int, bool>> lhmfun2() => {}; | 
 | FutureOr<LinkedHashSet<int>> lhsfun2() => {}; | 
 | FutureOr<Map<int, bool>> mapfun2() => {}; | 
 | FutureOr<Set<int>> setfun2() => {}; | 
 | main() async {} |