Make.Map
type key
type 'a t
type 'a producer = key -> 'a Lwt.t
module Map : Stdlib.Map.S with type key = key
val origin : 'a t -> wrapped_tree option
val string_of_key : key -> string
val loaded_bindings : 'a t -> (key * 'a option) list
val create : ?values:'a Map.t -> ?produce_value:'a producer -> ?origin:wrapped_tree -> unit -> 'a t