anchor.diff:  
    */
   
  -    String serverPath = "/app/lib/src/analysis_server_server.dart";
       List<String> arguments = [];
   
       //arguments.add ('--port=8181');
       //arguments.add ("8181");
   
  -    arguments.add('--enable-async');
  +    if (NEEDS_ENABLE_ASYNC) arguments.add('--enable-async');
       arguments.add('-p$PACKAGE_ROOT');
       //arguments.add('--enable-vm-service=8183');
       //arguments.add('--profile');
  
positive.code: library services.completer_driver;
  
  import 'dart:io' as io;
  import 'dart:async';
  import 'dart:collection';
  import 'dart:convert';
  import 'package:path/path.dart';
  
  import 'package:analysis_server/src/protocol.dart';
  
  
negative.code: // GAE configurations.
  String PACKAGE_ROOT = '/app/packages';
  String SDK = '/usr/lib/dart';
  String SERVER_PATH = "/app/lib/src/analysis_server_server.dart";
  
  bool NEEDS_ENABLE_ASYNC = true;
  bool USE_OVERLAYS = true;
  
  final Server server = new Server();
  