Metapp.Strinclude VisitableS with type t = Ppxlib.structuretype t = Ppxlib.structureval to_loc : t -> Location.tval iter : Ppxlib.Ast_traverse.iter -> t iterval map : Ppxlib.Ast_traverse.map -> t mapinclude PayloadS with type t := Ppxlib.structureval of_payload : Ppxlib.payload -> Ppxlib.structureval to_payload : Ppxlib.structure -> Ppxlib.payload