Kappa_data_structures.ValMap
type key = int
type t
val print : Stdlib.Format.formatter -> t -> unit
val random : Stdlib.Random.State.t -> t -> key
val empty : t
val is_empty : t -> bool
val add : key -> int -> t -> t
val mem : key -> t -> bool
val remove : key -> t -> t
val total : t -> Stdlib.Int64.t