@class NSString, NSDate, NSObject, SYBacklinkMonitorOperation; @protocol OS_dispatch_queue, SYBacklinkMonitorTestingDelegate, SYBacklinkMonitorDelegate; @interface SYBacklinkMonitor : NSObject <SYBacklinkMonitorOperationDelegate> @property (readonly, nonatomic) NSObject<OS_dispatch_queue> *_monitorQueue; @property (nonatomic) BOOL _needsActivityUpdate; @property (retain, nonatomic) SYBacklinkMonitorOperation *_activeOperation; @property (copy, nonatomic) id /* block */ _delayedChangeEvaluationBlock; @property (retain, nonatomic) NSDate *_lastOperationStartTime; @property (weak, nonatomic) id<SYBacklinkMonitorTestingDelegate> testingDelegate; @property (nonatomic) double testingOperationCoalescingInterval; @property (weak, nonatomic) id<SYBacklinkMonitorDelegate> delegate; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (id)init; - (void).cxx_destruct; - (void)backlinkMonitorOperationDidFinish:(id)a0; - (void)_beginNewOperation; - (void)_evaluatePendingRequests; - (void)userActivityDidChange; @end