@class NSUserDefaults, MPMusicPlayerQueueDescriptor, MPMusicPlayerControllerNowPlaying;
@interface MPMusicPlayerControllerSystemCache : NSObject {
NSUserDefaults *_defaults;
}
@property (class, readonly, nonatomic) MPMusicPlayerControllerSystemCache *sharedCache;
@property (retain, nonatomic) MPMusicPlayerControllerNowPlaying *nowPlaying;
@property (retain, nonatomic) MPMusicPlayerQueueDescriptor *queueDescriptor;
@property (readonly, nonatomic) BOOL hasCachedData;
- (void)clearCache;
- (id)_init;
- (BOOL)_saveObject:(id)a0 forKey:(id)a1 error:(id *)a2;
- (id)_objectOfClass:(Class)a0 forKey:(id)a1 error:(id *)a2;
- (void).cxx_destruct;
@end