Random.State

`sig
type t
val make : int array -> Random.State.t
val make_self_init : unit -> Random.State.t
val copy : Random.State.t -> Random.State.t
val bits : Random.State.t -> int
val int : Random.State.t -> int -> int
val int32 : Random.State.t -> Stdlib.Int32.t -> Stdlib.Int32.t
val nativeint : Random.State.t -> Stdlib.Nativeint.t -> Stdlib.Nativeint.t
val int64 : Random.State.t -> Stdlib.Int64.t -> Stdlib.Int64.t
val float : Random.State.t -> float -> float
val bool : Random.State.t -> bool
end`