Printable.UnitConfval equal : t -> t -> Ppx_deriving_runtime.boolval compare : t -> t -> Ppx_deriving_runtime.intinclude module type of struct include Std endtype group = Std.group = |val show_group : group -> 'aval invariant : 'a -> 'b -> Invariant.tval printXml : 'a BatInnerIO.output -> unit -> unit