MIDIObjectAddRemoveNotification A message that describes the addition or removal of an object. Declarationstruct MIDIObjectAddRemoveNotification TopicsInspecting the NotificationmessageIDmessageSizeparentparentTypechildchildTypeInitializersinit()init(messageID:messageSize:parent:parentType:child:childType:) RelationshipsConforms ToBitwiseCopyableSendable See AlsoNotificationsMIDIObjectPropertyChangeNotification