code: @Deactivate
      protected void deactivate(ComponentContext cc) {
          executorServiceRef.deactivate(cc);
          scheduledExecutorServiceRef.deactivate(cc);
          classLoadingServiceSR.deactivate(cc);
  
          if (workQueueBusListener != null) {
              LibertyApplicationBusFactory.getInstance().unregisterApplicationBusListener(workQueueBusListener);
          }
      }
docs: /*
  Called by Declarative Services to deactivate service