sig
type elt
type t
val is_empty : Collection.Set.S.t -> bool
val mem : Collection.Set.S.t -> Collection.Set.S.elt -> bool
val cardinal : Collection.Set.S.t -> int
val iter : (Collection.Set.S.elt -> unit) -> Collection.Set.S.t -> unit
val fold :
(Collection.Set.S.elt -> 'a -> 'a) -> Collection.Set.S.t -> 'a -> 'a
val elements : Collection.Set.S.t -> Collection.Set.S.elt list
val equal : Collection.Set.S.t -> Collection.Set.S.t -> bool
end