@class NSMutableDictionary, NWPathEvaluator, NSHashTable, NSObject; @protocol OS_dispatch_queue; @interface WFServiceReachabilityObserver : NSObject @property (retain) NSObject<OS_dispatch_queue> *observerQueue; @property (retain) NSMutableDictionary *blockObserversForUUID; @property (retain) NSHashTable *observerObjects; @property (nonatomic) long long reachability; @property (retain, nonatomic) NSObject<OS_dispatch_queue> *callbackQueue; @property (retain) NWPathEvaluator *serviceReachabilityEvaluator; @property (readonly) BOOL isServiceAvailable; + (id)sharedObserver; - (id)init; - (void)dealloc; - (BOOL)removeObserver:(id)a0; - (id)_init; - (void)_setupReachability; - (void)removeAllObservers; - (void)observeValueForKeyPath:(id)a0 ofObject:(id)a1 change:(id)a2 context:(void *)a3; - (void).cxx_destruct; - (void)addObserver:(id)a0; - (void)_deliverReachabilityUpdate:(long long)a0; - (id)addBlockObserver:(id /* block */)a0; - (BOOL)removeBlockObserverWithHandle:(id)a0; @end