module type Arbitrary = sig .. end
sig
end
type 'a t
'a
val gen : (?size:int -> Random.State.t -> 'a) -> ?size:int -> Random.State.t -> 'a t
(?size:int -> Random.State.t -> 'a) -> ?size:int -> Random.State.t -> 'a t
val to_string : ('a -> string) -> 'a t -> string
('a -> string) -> 'a t -> string