.Set: ClassType
.Set.
copy: |T|(self: .Set(T)) -> .Set(T)
differece: |T|(self: .Set(T), other: .Set(T)) -> .Set(T)
intersection: |T|(self: .Set(T), other: .Set(T)) -> .Set(T)
isdisjoint: |T|(self: .Set(T), other: .Set(T)) -> Bool
issubset: |T|(self: .Set(T), other: .Set(T)) -> Bool
issuperset: |T|(self: .Set(T), other: .Set(T)) -> Bool
symmetric_difference: |T|(self: .Set(T), other: .Set(T)) -> .Set(T)
union: |T|(self: .Set(T), other: .Set(T)) -> .Set(T)