Module type Js_min.OPT
val empty : 'a t
val return : 'a -> 'a t
val map : 'a t -> ('a -> 'b) -> 'b t
val bind : 'a t -> ('a -> 'b t) -> 'b t
val test : 'a t -> bool
val iter : 'a t -> ('a -> unit) -> unit
val case : 'a t -> (unit -> 'b) -> ('a -> 'b) -> 'b
val get : 'a t -> (unit -> 'a) -> 'a
val option : 'a option -> 'a t
val to_option : 'a t -> 'a option