Can be raised by key-value coding methods that want to explicitly disallow certain manipulations or accesses.
For instance, a setKey: method for a read-only key can raise this exception.
Available in Mac OS X v10.0 and later.


- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)