anchor.diff:          ..repoName = repoName.clone();
   }
   
  -class RepositoryDescriptiveFragment
  -    extends RepositoryDescriptiveFragmentResolver implements GQLFragment {
  -  @override
  -  String get onType => 'Repository';
  -}
  -
   class RepositoryIdFragmentResolver extends Object
       with Fields
       implements GQLField {
  
positive.code:       new AddTestCommentMutation()..addComment = addComment.clone();
  }
  
  class AddCommentMutation extends Object
      with Arguments, Fields
      implements GQLField {
  
negative.code:     ..description = description.clone();
  }
  
  class GistDescriptiveFragmentResolver extends Object
      with Fields
      implements GQLField {
  