Sets the label for the specified segment.
Original signature is '- (void)setLabel:(NSString *)label forSegment:(NSInteger)segment'
Available in Mac OS X v10.3 and later.


- label (NSString)
- The label you want to display in the segment. If the width of the string is greater than the width of the segment, the string's text is truncated during drawing.
- segment (NSInteger)
- The index of the segment whose label you want to set. This method raises an NSRangeException if the index is out of bounds.

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