anchor.diff:  String workerFolder;
   const START_NAME = "worker_isolate.dart";
   const DELAY_BETWEEN_TASK_POLLS = const Duration(seconds: 60);
  +const MAX_SPIN_WAITS_FOR_SEND_PORT = 100;
   
   // Worker properties.
   SendPort sendPort;
  
positive.code:     }
  
      var sourceMap = JSON.decode(sourceJSON);
      _ensureSourceIsInstalled(sourceMap);
      log.trace("Source installed");
  
      gae_utils.CloudStorageLocation inputLocation = await task.inputSource;
  
negative.code:   }
  
    if (pubspecPathsToUpdate.length > 0) _pubUpdate(pubspecPathsToUpdate);
    await _setupIsolate(path.join(workerFolder, START_NAME));
  
    log.debug("Isolate started with sha: $sha");
    shaCodeRunningInIsolate = sha;
  