include Ppx_hash_lib.Hashable.S with type t := t
val hash_fold_t : t Base__Ppx_hash_lib.hash_foldinclude module type of Volgo.Vcs.Graph.Descendance with type t := t
val compare : t -> t -> intval equal : t -> t -> boolval seeded_hash : int -> t -> intval sexp_of_t : t -> Sexplib0.Sexp.t