Frama-C API - Attachment
type t = {description : Message.t;artifactLocation : ArtifactLocation.t;regions : Region.t list;rectangles : Rectangle.t list;
}val to_yojson : t -> Yojson.Safe.tval of_yojson : Yojson.Safe.t -> t Ppx_deriving_yojson_runtime.error_or