Parameter Make.Key
include Sexplib0.Sexpable.S with type t := Key.t
val t_of_sexp : Sexplib0.Sexp.t -> Key.tinclude Core.Hashtbl_intf.Key_plain with type t := Key.t
val sexp_of_t : Key.t -> Sexplib0.Sexp.tval hash : Key.t -> intTwo ts that compare equal must have equal hashes for the hashtable to behave properly.