@interface CSClamshellStateMonitor : CSEventMonitor + (id)sharedInstance; - (void)_stopMonitoring; - (id)init; - (void)_startMonitoringWithQueue:(id)a0; - (void)_didReceiveClamshellStateChangeNotification:(BOOL)a0; - (void)_notifyObserver:(id)a0 withClamshellState:(BOOL)a1; - (BOOL)isClamshellClosed; @end