code: ServiceRefAmp service(QueueServiceFactoryInbox serviceFactory,
                          ServiceConfig config)
    {
      QueueDeliverBuilderImpl<MessageAmp> queueBuilder
        = new QueueDeliverBuilderImpl<>();
      
      //queueBuilder.setOutboxFactory(OutboxAmpFactory.newFactory());
      queueBuilder.setClassLoader(_services.classLoader());
      
      queueBuilder.sizeMax(config.queueSizeMax());
      queueBuilder.size(config.queueSize());
    
      InboxAmp inbox = new InboxQueue(_services, 
                                      queueBuilder,
                                      serviceFactory,
                                      config);
  
      return inbox.serviceRef();
    }
docs: Used by journal builder.