Returns an initialized mutable ordered set with a given initial capacity.
- iOS 5.0+
- macOS 10.7+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
The initial capacity of the new ordered set.
An initialized mutable ordered set with initial capacity to hold
Mutable ordered sets allocate additional memory as needed, so
num simply establishes the set’s initial capacity.
This method is a designated initializer of