sig module Binable : Binable.S2 type ('a, 'b) t val to_binable : ('a, 'b) Utils.Make_binable2_spec.t -> ('a, 'b) Binable.binable val of_binable : ('a, 'b) Binable.binable -> ('a, 'b) Utils.Make_binable2_spec.t end