Prototype API for accessing AST nodes.

dart/sdk/lib/_internal/compiler/samples/constants/sample_input.dart

 // Copyright (c) 2014, 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.
 
-class A {
-  static var a;
-  var b;
+@Fisk()
+class Fisk {
+  const Fisk();
 }
 
-class B extends A {
+const toplevel = const Fisk();
 
+methodWithNamedArguments({foo, bar: const Fisk()}) {
 }
 
-class C extends B {
-  var a; /// 01: static type warning
-  static var b; /// 02: compile-time error
+methodWithOptionalArguments([foo, bar = const Fisk()]) {
 }
-
-void main() {
-  new C();
-}