anchor.diff:          AnalysisOptions,
           AnalysisOptionsImpl,
           PerformanceStatistics;
  -import 'package:analyzer/src/generated/resolver.dart';
   import 'package:analyzer/src/generated/source.dart';
   import 'package:analyzer/src/generated/utilities_general.dart';
   import 'package:analyzer/src/lint/registry.dart' as linter;
  
positive.code:           resolvedUnits.add(
              new AnalysisResult(
                currentSession,
                _sourceFactory,
                unitFile.path,
                unitFile.uri,
                unitFile.exists,
  
negative.code:       this._index)
        : super(session, path, uri, exists, content, lineInfo, isPart, unit,
              errors);
  }
  
  class DriverPerformance {
  