Posted whenever an item is collapsed in an NSOutlineView object.
The notification object is the NSOutlineView object in which an item was collapsed. A collapsed item’s children lose their status as being selected. The userInfo dictionary contains the following information:
KeyValue@"NSObject"The item that was collapsed (an id)
Available in Mac OS X v10.0 and later.
Declaration Syntax 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)