OpamStd.ABSTRACT
A signature for handling abstract keys and collections thereof
type t
val compare : t -> t -> int
val equal : t -> t -> bool
val of_string : string -> t
val to_string : t -> string
val to_json : t OpamJson.encoder
val of_json : t OpamJson.decoder
module Set : OpamStd.SET with type elt = t
module Map : OpamStd.MAP with type key = t