Returns whether the specified item is a leaf item.
Original signature is '- (BOOL)isLeafItem:(id)item'
Available in Mac OS X v10.6 and later.


- item (Id)
- The item to be checked.

YES if the item is a leaf item; otherwise, NO.

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