@class NSHashTable, NSArray; @interface MRUHardwareVolumeController : NSObject @property (class, readonly, nonatomic) MRUHardwareVolumeController *sharedInstance; @property (retain, nonatomic) NSHashTable *assertions; @property (retain, nonatomic) NSArray *invalidators; - (id)init; - (void).cxx_destruct; - (void)relinquishHardwareVolumeButtons; - (id)requestControlsForVolumeDataSource:(id)a0 reason:(id)a1; - (void)unregisterAssertion:(id)a0; - (void)updateControlsForAssertion:(id)a0; @end