Posted before an NSUndoManager object closes an undo group, which occurs in the implementation of the endUndoGrouping method.
NSUndoManager
userInfo
Available in Mac OS X v10.0 and later.

Declaration Syntax
public static readonly NSString NSUndoManagerWillCloseUndoGroupNotification
Public Shared ReadOnly NSUndoManagerWillCloseUndoGroupNotification As NSString
public:
static initonly NSString^ NSUndoManagerWillCloseUndoGroupNotification

Version Information
- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)
Assembly:
Monobjc.Foundation (Module: Monobjc.Foundation)