Module Ocsipersist_lib.Ref Parametersmodule Store : Sigs.STORESignatureval store : Store.store Lwt.t lazy_ttype 'a t = | Ref of 'a Stdlib.ref| Per of 'a Store.t Lwt.tval ref : ?persistent:string -> 'a -> 'a tval get : 'a t -> 'a Lwt.tval set : 'a t -> 'a -> unit Lwt.t