val lru : int -> (module Stdlib.Hashtbl.HashedType with type t = 'key) -> (module Lru.Weighted with type t = 'value) -> ('key, 'value) tRPDec.Cacheval lru : int -> (module Stdlib.Hashtbl.HashedType with type t = 'key) -> (module Lru.Weighted with type t = 'value) -> ('key, 'value) t