@class NSString, NSUUID; @interface HMMutableMediaSystemData : HMMediaSystemData @property (copy) NSString *name; @property (getter=isDefaultName) BOOL defaultName; @property (copy) NSUUID *leftDestinationIdentifier; @property (copy) NSUUID *rightDestinationIdentifier; @property (copy) NSUUID *associatedGroupIdentifier; @end