sig
type t
val create : int -> IntCollection.t
val is_empty : IntCollection.t -> bool
val size : IntCollection.t -> int
val add : int -> IntCollection.t -> unit
val remove : int -> IntCollection.t -> unit
val random : Random.State.t -> IntCollection.t -> int option
val fold : (int -> 'a -> 'a) -> IntCollection.t -> 'a -> 'a
val print : Format.formatter -> IntCollection.t -> unit
end