Creates and returns a ordered set containing the objects in a given argument list.
- iOS 5.0+
- macOS 10.7+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
The first object to add to the new set.
A comma-separated list of objects, ending with
nil, to add to the new set.
If the same object appears more than once in the list of objects, it is added only once to the returned set. The objects are added to the ordered set in the order that they are listed.
A new ordered set containing the objects in the argument list.