A set data structure backed by a vector. The set is guaranteed not to contain
duplicate keys. All operations are O(N) in the size of the set
the intention of this data structure is only to provide the convenience of
programming against a set API. Sets that need sorted iteration rather than
insertion order iteration should be handwritten.
A set data structure backed by a vector. The set is guaranteed not to contain duplicate keys. All operations are O(N) in the size of the set