include sig ... end
val sexp_of_t : t ‑> Base.Sexp.t
include Topological_sort__.Import.Equal.S with type t := t
val equal : t Topological_sort__.Import.Equal.equal
include Topological_sort__.Import.Hashtbl.Key with type t := t
val sexp_of_t : t ‑> Base.Sexp.t
val hash : t ‑> int