@class NSObject, NSXPCConnection, NSCondition, NSMutableArray, BrightnessSystemClientExportedObj; @protocol OS_dispatch_queue, OS_os_log; @interface BrightnessSystemClientInternal : NSObject { NSXPCConnection *_connection; id _remote; BrightnessSystemClientExportedObj *exportedObj; NSMutableArray *_clientProperties; NSCondition *copyPropertyForKeyWaitCondition; BOOL copyPropertyForKeyCompleted; BOOL _useSynchronousRemote; NSObject<OS_dispatch_queue> *_serialQueue; NSObject<OS_os_log> *_logHandle; } - (id)copyPropertyForKey:(id)a0; - (id)init; - (void)dealloc; - (void)stopXpcService; - (void)addPropertiesForNotification:(id)a0; - (void)addKeyToClientProperties:(id)a0; - (BOOL)setProperty:(id)a0 forKey:(id)a1; - (void)removePropertyFromNotification:(id)a0; - (void)registerNotificationBlock:(id /* block */)a0 forProperties:(id)a1; - (void)removeKeyFromClientProperties:(id)a0; - (void)removePropertiesFromNotification:(id)a0; - (void)registerNotificationBlock:(id /* block */)a0; - (BOOL)setSyncProperty:(id)a0 forKey:(id)a1; - (void)addPropertyForNotification:(id)a0; @end