Module Id.Map
val add : key -> 'a -> 'a t -> 'a tval cardinal : _ t -> intval bindings : 'a t -> (key * 'a) listval find : key -> 'a t -> 'aval iter : (key -> 'a -> unit) -> 'a t -> unitval fold : (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'bval mem : key -> 'a t -> bool