If the value of the NSKeyValueChangeKindKey entry is NSKeyValueChangeInsertion, NSKeyValueChangeRemoval, or NSKeyValueChangeReplacement, the value of this key is an NSIndexSet object that contains the indexes of the inserted, removed, or replaced objects.
Available in Mac OS X v10.3 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)