| // Copyright (c) 2018, the Dart project authors.  Please see the AUTHORS file | 
 | // for details. All rights reserved. Use of this source code is governed by a | 
 | // BSD-style license that can be found in the LICENSE file. | 
 |  | 
 | import 'package:expect/expect.dart'; | 
 |  | 
 | class A<T> {} | 
 |  | 
 | final map = {}; | 
 |  | 
 | class B<T> { | 
 |   void foo() { | 
 |     Expect.equals(map[new A<T>().runtimeType], 42); | 
 |   } | 
 | } | 
 |  | 
 | class C<T, U> { | 
 |   void build() { | 
 |     new B<T>().foo(); | 
 |     new B<U>().foo(); | 
 |     Expect.equals(new B<T>().runtimeType, new B<U>().runtimeType); | 
 |   } | 
 | } | 
 |  | 
 | void main() { | 
 |   map[new A<String>().runtimeType] = 42; | 
 |   new C<String, String>().build(); | 
 | } |