anchor.diff:  
   import 'package:analyzer/file_system/file_system.dart';
   import 'package:analyzer/file_system/physical_file_system.dart';
  +import 'package:analyzer_utilities/package_root.dart';
   import 'package:args/command_runner.dart';
   import 'package:intl/intl.dart';
   import 'package:path/path.dart' as path;
  
positive.code:   final String kind;
  
    Benchmark(this.id, this.description,
        {this.enabled = true, this.kind = 'cpu'});
  
    int get maxIterations => 0;
  
  
negative.code:     FlutterAnalyzeBenchmark(),
    ];
  
    var runner = CommandRunner(
      'benchmark',
      'A benchmark runner for the analysis server.',
    );
    runner.addCommand(ListCommand(benchmarks));
    runner.addCommand(RunCommand(benchmarks));
    runner.run(args);
  }
  
  String get analysisServerSrcPath {
    return path.join(packageRoot, 'analysis_server');
  }
  
  void deleteServerCache() {
  