`sig type ('k1, 'k2, 'd) t val create : unit -> ('k1, 'k2, 'd) Ephemeron.K2.t val get_key1 : ('k1, 'k2, 'd) Ephemeron.K2.t -> 'k1 option val get_key1_copy : ('k1, 'k2, 'd) Ephemeron.K2.t -> 'k1 option val set_key1 : ('k1, 'k2, 'd) Ephemeron.K2.t -> 'k1 -> unit val unset_key1 : ('k1, 'k2, 'd) Ephemeron.K2.t -> unit val check_key1 : ('k1, 'k2, 'd) Ephemeron.K2.t -> bool val get_key2 : ('k1, 'k2, 'd) Ephemeron.K2.t -> 'k2 option val get_key2_copy : ('k1, 'k2, 'd) Ephemeron.K2.t -> 'k2 option val set_key2 : ('k1, 'k2, 'd) Ephemeron.K2.t -> 'k2 -> unit val unset_key2 : ('k1, 'k2, 'd) Ephemeron.K2.t -> unit val check_key2 : ('k1, 'k2, 'd) Ephemeron.K2.t -> bool val blit_key1 : ('k1, 'a, 'b) Ephemeron.K2.t -> ('k1, 'c, 'd) Ephemeron.K2.t -> unit val blit_key2 : ('a, 'k2, 'b) Ephemeron.K2.t -> ('c, 'k2, 'd) Ephemeron.K2.t -> unit val blit_key12 : ('k1, 'k2, 'a) Ephemeron.K2.t -> ('k1, 'k2, 'b) Ephemeron.K2.t -> unit val get_data : ('k1, 'k2, 'd) Ephemeron.K2.t -> 'd option val get_data_copy : ('k1, 'k2, 'd) Ephemeron.K2.t -> 'd option val set_data : ('k1, 'k2, 'd) Ephemeron.K2.t -> 'd -> unit val unset_data : ('k1, 'k2, 'd) Ephemeron.K2.t -> unit val check_data : ('k1, 'k2, 'd) Ephemeron.K2.t -> bool val blit_data : ('k1, 'k2, 'd) Ephemeron.K2.t -> ('k1, 'k2, 'd) Ephemeron.K2.t -> unit module Make : functor (H1 : Hashtbl.HashedType) (H2 : Hashtbl.HashedType) -> sig type key = H1.t * H2.t type 'a t val create : int -> 'a t val clear : 'a t -> unit val reset : 'a t -> unit val copy : 'a t -> 'a t val add : 'a t -> key -> 'a -> unit val remove : 'a t -> key -> unit val find : 'a t -> key -> 'a val find_all : 'a t -> key -> 'a list val replace : 'a t -> key -> 'a -> unit val mem : 'a t -> key -> bool val iter : (key -> 'a -> unit) -> 'a t -> unit val filter_map_inplace : (key -> 'a -> 'a option) -> 'a t -> unit val fold : (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b val length : 'a t -> int val stats : 'a t -> Hashtbl.statistics val clean : 'a t -> unit val stats_alive : 'a t -> Hashtbl.statistics end module MakeSeeded : functor (H1 : Hashtbl.SeededHashedType) (H2 : Hashtbl.SeededHashedType) -> sig type key = H1.t * H2.t type 'a t val create : ?random:bool -> int -> 'a t val clear : 'a t -> unit val reset : 'a t -> unit val copy : 'a t -> 'a t val add : 'a t -> key -> 'a -> unit val remove : 'a t -> key -> unit val find : 'a t -> key -> 'a val find_all : 'a t -> key -> 'a list val replace : 'a t -> key -> 'a -> unit val mem : 'a t -> key -> bool val iter : (key -> 'a -> unit) -> 'a t -> unit val filter_map_inplace : (key -> 'a -> 'a option) -> 'a t -> unit val fold : (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b val length : 'a t -> int val stats : 'a t -> Hashtbl.statistics val clean : 'a t -> unit val stats_alive : 'a t -> Hashtbl.statistics end end`