Implement adding methods.

dart/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 'elements.dart';
 import '../constants/expressions.dart';
 import '../helpers/helpers.dart';  // Included for debug helpers.
 import '../tree/tree.dart';
@@ skipping 1539 matching lines @@
   BaseFunctionElementX(String name,
                        ElementKind kind,
                        Modifiers this.modifiers,
                        Element enclosing,
                        bool hasNoBody)
       : super(name, kind, enclosing),
         _hasNoBody = hasNoBody {
     assert(modifiers != null);
   }
 
+  bool get hasNoBody => _hasNoBody;
+
   bool get isInstanceMember {
     return isClassMember
            && !isConstructor
            && !isStatic;
   }
 
   bool get hasFunctionSignature => functionSignatureCache != null;
 
   FunctionSignature computeSignature(Compiler compiler) {
     if (functionSignatureCache != null) return functionSignatureCache;
@@ skipping 1247 matching lines @@
   AstElement get definingElement;
 
   bool get hasResolvedAst => definingElement.hasTreeElements;
 
   ResolvedAst get resolvedAst {
     return new ResolvedAst(declaration,
         definingElement.node, definingElement.treeElements);
   }
 
 }