Serialize prefix members.

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

 // Copyright (c) 2013, 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.modelx;
 
 import '../common.dart';
 import '../common/names.dart' show Identifiers;
 import '../common/resolution.dart' show Resolution, ParsingContext;
 import '../compiler.dart' show Compiler;
@@ skipping 1244 matching lines @@
   final ImportElement deferredImport;
 
   PrefixElementX(
       String prefix, Element enclosing, this.firstPosition, this.deferredImport)
       : super(prefix, ElementKind.PREFIX, enclosing);
 
   bool get isTopLevel => false;
 
   Element lookupLocalMember(String memberName) => importScope[memberName];
 
+  void forEachLocalMember(f(Element member)) => importScope.forEach(f);
+
   DartType computeType(Resolution resolution) => const DynamicType();
 
   Token get position => firstPosition;
 
   void addImport(
       Element element, ImportElement import, DiagnosticReporter reporter) {
     importScope.addImport(this, element, import, reporter);
   }
 
   accept(ElementVisitor visitor, arg) {
@@ skipping 2108 matching lines @@
       body = node.asFunctionExpression().body;
     }
     return new ParsedResolvedAst(
         declaration,
         node,
         body,
         definingElement.treeElements,
         definingElement.compilationUnit.script.resourceUri);
   }
 }