@class NSString; @interface PHASESessionVolumeImpl : NSObject <PHASESessionVolumeInterface> @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (BOOL)registerVolumeChangedNotificationBlock:(id /* block */)a0; - (id)volumeForCommand:(id)a0; - (id)volumeForCommandFromCallback:(id)a0; @end