code: void addPod(PodBuilderConfig pod)
    {
      String podName = pod.getId() + "." + pod.getCluster().id();
      
      if (_podMap.get(podName) != null) {
        throw new IllegalStateException(L.l("Duplicate pod '{0}'", pod.getId()));
      }
      
      _podMap.put(podName, pod);
    }
docs: /*
  @Override
  protected JoinClient buildJoinClient()
  {
  return new JoinClient(getServerSelf(), getRoot());
  }