Performs validation on the receiver’s new value.
Original signature is '- (BOOL)textShouldEndEditing:(NSText *)textObject'
Available in Mac OS X v10.0 and later.


- textObject (NSText)
- The text object requesting permission to end editing.

YES if the new value is valid; otherwise NO.

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