@class NSString, DNDState, NSHashTable, DNDStateService; @interface SBDoNotDisturbStateMonitor : NSObject <DNDStateUpdateListener> { struct os_unfair_lock_s { unsigned int _os_unfair_lock_opaque; } _lock; NSHashTable *_lock_observers; DNDState *_lock_state; DNDStateService *_stateService; } @property (readonly, copy, nonatomic) DNDState *state; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; + (id)sharedInstance; - (id)init; - (void)removeObserver:(id)a0; - (void)stateService:(id)a0 didReceiveDoNotDisturbStateUpdate:(id)a1; - (void).cxx_destruct; - (void)addObserver:(id)a0; - (void)_noteNewDNDState:(id)a0; @end