|  | // Copyright (c) 2016, 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 { | 
|  | int _x = 42; | 
|  | void set x(int val) { | 
|  | _x = val; | 
|  | } | 
|  |  | 
|  | int get x => _x; | 
|  | } | 
|  |  | 
|  | class B extends A { | 
|  | final x = 3; | 
|  | // we can still get to the super property | 
|  | int get y => _x; | 
|  | } | 
|  |  | 
|  | void main() { | 
|  | var b = new B(); | 
|  | Expect.equals(3, b.x); | 
|  |  | 
|  | b.x = 21; | 
|  | Expect.equals(3, b.x); | 
|  | Expect.equals(21, b.y); | 
|  | } |