Commit.Mergetype req = Store.Info.t * (key option option * key option * key option)type res = (key option, Irmin.Merge.conflict) Stdlib.Result.tval req_t : req Irmin.Type.tval res_t : res Irmin.Type.tval run : Conn.t -> context -> Server_info.t -> req -> res Conn.Return.t Lwt.t