You can search for identifiers within the package.
in-package search v0.2.0
type 'value t
val make : unit -> 'a Js_of_ocaml.Js.Opt.t t
val t_of_js : (Ojs.t -> 'value) -> Ojs.t -> 'value t
val t_to_js : ('value -> Ojs.t) -> 'value t -> Ojs.t
val current : 'value t -> 'value
val set_current : 'value t -> 'value -> unit