Creates a new immutable character set that is the invert of the specified character set.
- iOS 2.0+
- macOS 10.2+
- tvOS 9.0+
- watchOS 2.0+
- Core Foundation
The allocator to use to allocate memory for the new object. Pass
NULLor kCFAllocatorDefault to use the current default allocator.
The character set from which to create an inverted set.
A new character set that is the invert of
the. Ownership follows the The Create Rule.