willCloseUndoGroup
An identifier for a message about an undo manager preparing to close an undo group.
Declaration
static var willCloseUndoGroup: NotificationCenter.BaseMessageIdentifier<UndoManager.WillCloseUndoGroupMessage> { get }Discussion
Use this identifier with NotificationCenter’s addObserver(of:for:using:) or messages(of:for:bufferSize:) methods to observe messages of type UndoManager.WillCloseUndoGroupMessage.