anchor.diff:  
   class ErrorMessageForAnnotation extends AsyncBuildError {
     final IndexedAnnotation indexedAnnotation;
  -  final String message;
  -
  -  ErrorMessageForAnnotation(this.indexedAnnotation, this.message);
  +
  +  ErrorMessageForAnnotation(
  +    this.indexedAnnotation,
  +    String message,
  +  ) : super(message);
   
     /// Find the ancestor node that should have the metadata and return
     /// that metadata.
  
positive.code: 
  Future<ElementDeclarationResult> _resolvedClassResult(Element element) async {
    var libraryElement = element.library;
    var libraryResult = await ResolvedLibraryResultImpl.tmp(libraryElement);
    if (libraryResult.state == ResultState.NOT_A_FILE) {
      // We don't have access to source information in summarized libraries,
  
negative.code: import 'package:analyzer/dart/analysis/results.dart';
  import 'package:analyzer/dart/ast/ast.dart';
  import 'package:analyzer/dart/element/element.dart';
  import 'package:analyzer/error/error.dart';
  import 'package:analyzer/src/dart/analysis/results.dart';
  