module MakeSeeded: 
Functor building an implementation of the hashtable structure.
    The functor 
Hashtbl.MakeSeeded returns a structure containing
    a type 
key of keys and a type 
'a t of hash tables
    associating data of type 
'a to keys of type 
key.
    The operations perform similarly to those of the generic
    interface, but use the seeded hashing and equality functions
    specified in the functor argument 
H instead of generic
    equality and hashing.  The 
create operation of the
    result structure supports the 
~random optional parameter
    and returns randomized hash tables if 
~random:true is passed
    or if randomization is globally on (see 
Hashtbl.randomize).
Since 4.00.0
type 
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