question: private QueuedRequestSender ( Builder builder ) { this . messageStore = builder . messageStore ; this . clientRegistry = builder . clientRegistry ; this . observationRegistry = builder . observationRegistry ; this . delegateSender = builder . delegateSender ; this . clientStatusTracker = new ClientStatusTracker ( ) ; this . queueModeClientRegistryListener = new QueueModeClientRegistryListener ( ) ; clientRegistry . addListener ( queueModeClientRegistryListener ) ; this . queueModeObservationRegistryListener = new QueueModeObservationRegistryListener ( ) ; observationRegistry . addListener ( queueModeObservationRegistryListener ) ; delegateSender . addResponseListener ( createResponseListener ( ) ) ; }
target:  Creates a new QueueRequestSender using given builder.