Returns a Boolean value that indicates whether a given item is expanded.
Original signature is '- (BOOL)isItemExpanded:(id)item'
Available in Mac OS X v10.0 and later.


- item (Id)
- An item in the receiver.

YES if item is expanded, 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)