You can search for identifiers within the package.
in-package search v0.2.0
type t =
| Device_ready
| Pause
| Resume
| Back_button
| Menu_button
| Search_button
| Start_call_button
| End_call_button
| Vol_up_button
| Vol_down_button
val add_event_listener : t -> (unit -> unit) -> bool -> unit
val device_ready : (unit -> unit) -> unit