@Override
  public void setJobId(String jobId) {
    for (Monitor delegate : delegates) {
      if (delegate instanceof JobAwareMonitor) {
        ((JobAwareMonitor) delegate).setJobId(jobId);
      }
    }
  }
Forwards monitor events to a set of delegates.
portability-api-launcher/src/main/java/org/datatransferproject/launcher/monitor/MultiplexMonitor.java