type t = | V2_0| V2_1| V2_1_Goblint
val compare : t -> t -> Ppx_deriving_runtime.intval of_enum : int -> t optioninclude sig ... end
val pretty : unit -> t -> Printable.Pretty.docval printXml : 'a BatInnerIO.output -> t -> unitval to_yojson : t -> [> `String of string ]val of_string : string -> tval of_option : unit -> t