anchor.diff:  }
   
   class _InheritanceDataExtractor extends AstDataExtractor<String> {
  +  final inheritance = InheritanceManager3();
  +
     _InheritanceDataExtractor(Uri uri, Map<Id, ActualData<String>> actualMap)
         : super(uri, actualMap);
   
  
positive.code: import 'package:analyzer/dart/element/type.dart';
  import 'package:analyzer/error/error.dart';
  import 'package:analyzer/src/dart/analysis/testing_data.dart';
  import 'package:analyzer/src/util/ast_data_extractor.dart';
  
  import '../util/id_testing_helper.dart';
  
negative.code:   }
    return sb.toString();
  }
  