Returns the index of the menu item with the specified tag.
Original signature is '- (NSInteger)indexOfItemWithTag:(NSInteger)tag'
Available in Mac OS X v10.0 and later.


- tag (NSInteger)
- The tag of the menu item you want.

The index of the item or -1 if no item with the specified tag was found.

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