code: public static NetworkSystemBartender
    createAndAddSystem(SystemManager systemManager,
                       ServerBartender selfServer,
                       Config config)
    {
      NetworkSystemBartender clusterSystem
        = new NetworkSystemBartender(systemManager, selfServer, config);
      
      createAndAddSystem(clusterSystem);
      
      return clusterSystem;
    }
docs: Creates a new network cluster service.