isSuperset(of:) Returns true if self is a superset of other. Declarationfunc isSuperset(of other: CharacterSet) -> Bool See AlsoCombining Character SetsformIntersection(_:)formSymmetricDifference(_:)formUnion(_:)hasMember(inPlane:)insert(charactersIn:)intersection(_:)invert()remove(charactersIn:)subtracting(_:)symmetricDifference(_:)union(_:)