anchor.diff:    /// A table mapping element kinds to counts by context.
     Map<String, Map<String, int>> byElementKind = {};
   
  -  /// A table mapping AST node classes to counts by context.
  -  Map<String, Map<String, int>> byNodeClass = {};
  -
     /// A table mapping token types to counts by context.
     Map<String, Map<String, int>> byTokenType = {};
   
  
positive.code:   void visitCommentReference(CommentReference node) {
      void recordDataForCommentReference(String context, AstNode node) {
        _recordElementKind(context, node);
        _recordNodeClass(context, node);
        _recordTokenType(context, node);
      }
  
  
negative.code:           }
          }
        }
      }
    }
  
  