anchor.diff:    void endClassBody(int memberCount, Token beginToken, Token endToken) {
       debugEvent("ClassBody");
       push(popList(memberCount,
  -        new List<dynamic>.filled(memberCount, null, growable: true)));
  +        new List<ClassMember>.filled(memberCount, null, growable: true)));
     }
   
     @override
  
positive.code: // 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:front_end/src/fasta/problems.dart'
      show internalProblem, unsupported;
  import 'package:front_end/src/fasta/messages.dart' show Message;
  import 'package:front_end/src/fasta/parser.dart';
  import 'package:front_end/src/fasta/source/stack_listener.dart';
  import 'package:front_end/src/scanner/token.dart';
  
  
negative.code:   @override
    void endTypeArguments(int count, Token beginToken, Token endToken) {
      debugEvent("TypeArguments");
      push(
          popList(count, new List<TypeName>.filled(count, null, growable: true)));
    }
  
    @override
  