# Module Ocsigen_server.Site.Config

    module Config: Ocsigen_server.Config_nested  with type t := t

    type t

    type 'a key

    val key : ?preprocess:('a -> 'a) -> unit -> 'a key

    val find : t ->
           'a key -> 'a option

    val set : t ->
           'a key -> 'a -> unit

    val unset : t -> 'a key -> unit

    type accessor = {

`` | `accessor : `'a. 'a key -> 'a option`;`

`}`