anchor.diff:      final ReceivePort errorReceivePort = new ReceivePort();
       final ReceivePort protocolReceivePort = new ReceivePort();
       await Isolate.spawn(
  -      frontendEntryPoint,
  -      new FrontendEntryMessage(
  -        frontendIndex: frontendIndex,
  -        protocolSendPort: protocolReceivePort.sendPort,
  -      ),
  +      _wrapper,
  +      [
  +        frontendEntryPoint,
  +        new FrontendEntryMessage(
  +          frontendIndex: frontendIndex,
  +          protocolSendPort: protocolReceivePort.sendPort,
  +        ),
  +      ],
         onError: errorReceivePort.sendPort,
         onExit: errorReceivePort.sendPort,
         errorsAreFatal: true,
  
positive.code: import 'package:gcloud/storage.dart';
  import 'package:logging/logging.dart';
  import 'package:meta/meta.dart';
  
  import 'configuration.dart';
  import 'scheduler_stats.dart';
  
negative.code:     final ReceivePort protocolReceivePort = new ReceivePort();
      final ReceivePort statsReceivePort = new ReceivePort();
      await Isolate.spawn(
        _wrapper,
        [
          workerEntryPoint,
          new WorkerEntryMessage(
            workerIndex: workerIndex,
            protocolSendPort: protocolReceivePort.sendPort,
            statsSendPort: statsReceivePort.sendPort,
          ),
        ],
        onError: errorReceivePort.sendPort,
        onExit: errorReceivePort.sendPort,
        errorsAreFatal: true,
  