code: @Bean
      public ServiceQueue clusteredEventManagerServiceQueue(final @Qualifier("eventBusCluster")
                                                            EventBusCluster eventBusCluster) {
  
          if (eventBusCluster == null) {
              return null;
          }
          return eventBusCluster.eventServiceQueue();
      }
docs: The actual service queue for the clustered event bus.
  All events are sent to this queue first.
  
  @param eventBusCluster actual event manager impl no proxy
  @return the service queue