sig
type t
val print : Format.formatter -> t -> unit
val location : t -> A.Automaton.Location.t
val region : t -> A.Semantics.Region.t
val mark : t -> Mark.t
val refine : t -> A.Semantics.Region.t -> unit
val compare : t -> t -> int
val equal : t -> t -> bool
val hash : t -> int
end