anchor.diff:  
     for (String service in services) {
       print('\nDeploying $service...\n');
  -    await new _ServiceDeployer(service, newVersion, deleteOld, migrateTraffic)
  +    await new _ServiceDeployer(
  +            service, newVersion, deleteOld, migrateTraffic, stopFirst)
           .deploy();
     }
   
  
positive.code: 
    final bool deleteOld = args.contains('--delete-old');
    final bool migrateTraffic = args.contains('--migrate');
  
    if (deleteOld && !migrateTraffic) {
      die('Cannot delete the old version without migrating traffic');
  
negative.code: void die(String msg) {
    print('$msg:');
    print('deploy.dart ( app | analyzer | dartdoc | search | all ) '
        '[ --delete-old ] [ --migrate ] [ --stop-first ]');
    exit(1);
  }
  
  