Serialize prefix members.

pkg/compiler/lib/src/elements/elements.dart

 // Copyright (c) 2012, 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.
 
 library elements;
 
 import '../common.dart';
 import '../common/resolution.dart' show Resolution;
 import '../compiler.dart' show Compiler;
 import '../constants/constructors.dart';
@@ skipping 922 matching lines @@
   /// "a b.dart").
   String get libraryOrScriptName;
 
   int compareTo(LibraryElement other);
 }
 
 /// The implicit scope defined by a import declaration with a prefix clause.
 abstract class PrefixElement extends Element {
   Element lookupLocalMember(String memberName);
 
+  void forEachLocalMember(void f(Element member));
+
   /// Is true if this prefix belongs to a deferred import.
   bool get isDeferred;
 
   /// Import that declared this deferred prefix.
   ImportElement get deferredImport;
 
   /// The `loadLibrary` getter implicitly defined on deferred prefixes.
   GetterElement get loadLibrary;
 }
 
@@ skipping 901 matching lines @@
   /// by a field.
   bool get isDeclaredByField;
 
   /// Returns `true` if this member is abstract.
   bool get isAbstract;
 
   /// If abstract, [implementation] points to the overridden concrete member,
   /// if any. Otherwise [implementation] points to the member itself.
   Member get implementation;
 }