anchor.diff:        print(record.stackTrace);
     });
   
  -  new FlutterCommandRunner()
  +  FlutterCommandRunner runner = new FlutterCommandRunner()
       ..addCommand(new BuildCommand())
       ..addCommand(new CacheCommand())
       ..addCommand(new InitCommand())
  
positive.code: /// Main entry point for commands.
  ///
  /// This function is intended to be used from the [flutter] command line tool.
  void main(List<String> args) {
    Logger.root.level = Level.WARNING;
    Logger.root.onRecord.listen((LogRecord record) {
      print('${record.level.name}: ${record.message}');
  
negative.code:     ..addCommand(new RunMojoCommand())
      ..addCommand(new StartCommand())
      ..addCommand(new StopCommand())
      ..addCommand(new TraceCommand());
  
    try {
      await runner.run(args);
    } on UsageException catch (e) {
      print(e);
      exit(1);
    }
  }
  