@interface NSMenu (ITCategory)
-- (void)indentItem:(NSMenuItem *)item;
+- (void)indentItem:(id <NSMenuItem>)item;
- (void)indentItemAtIndex:(int)index;
-- (void)indentItem:(NSMenuItem *)item toLevel:(int)indentLevel;
+- (void)indentItem:(id <NSMenuItem>)item toLevel:(int)indentLevel;
- (void)indentItemAtIndex:(int)index toLevel:(int)indentLevel;
- (MenuRef)menuRef;