val equal : t -> t -> bool
val compare : t -> t -> int
val pretty : unit -> t -> Printable.Pretty.doc
val printXml : 'a BatInnerIO.output -> t -> unit
val name : unit -> string
val to_yojson : t -> Yojson.Safe.t
val arbitrary : unit -> t QCheck.arbitrary
val pretty_diff : unit -> (t * t) -> Lattice.Pretty.doc