Removes the elements of the given set from this set.
- iOS 8.0+
- macOS 10.10+
- tvOS 9.0+
- watchOS 2.0+
- Xcode 8.0+
A set of the same type as the current set.
In the following example, the elements of the
employees set that are also members of the
neighbors set are removed. In particular, the names
"Eric" are removed from