anchor.diff:    }
   
     Future<void> _addFix_replaceFinalWithConst() async {
  -    // TODO(brianwilkerson) Determine whether this await is necessary.
  -    await null;
       if (node is VariableDeclarationList) {
         var changeBuilder = _newDartChangeBuilder();
         await changeBuilder.addFileEdit(file, (DartFileEditBuilder builder) {
  
positive.code: 
    Future<void> _addFix_undefinedClassMember_useSimilar(
        Expression target, ElementPredicate predicate) async {
      // TODO(brianwilkerson) Determine whether this await is necessary.
      await null;
      if (node is SimpleIdentifier) {
        String name = (node as SimpleIdentifier).name;
        _ClosestElementFinder finder =
  
negative.code:   }
  
    Future<void> _addFix_createNoSuchMethod() async {
      if (node.parent is! ClassDeclaration) {
        return;
      }
  