anchor.diff:    final String _fileSystemScheme;
     String _sdkRoot;
     Process _server;
  -  final _StdoutHandler stdoutHandler;
  +  final _StdoutHandler _stdoutHandler;
   
     /// If invoked for the first time, it compiles Dart script identified by
     /// [mainPath], [invalidatedFiles] list is ignored.
  
positive.code:       printError('Failed to start frontend server $error, $stack');
      });
  
      final _StdoutHandler stdoutHandler = new _StdoutHandler();
  
      server.stderr
        .transform(utf8.decoder)
  
negative.code:     _server.stdin.writeln(klass ?? '');
      _server.stdin.writeln(isStatic ?? false);
  
      return _stdoutHandler.compilerOutput.future;
    }
  
    /// Should be invoked when results of compilation are accepted by the client.
  