You can search for identifiers within the package.
in-package search v0.2.0
moonpool.private
Moonpool_private.Domain_
val recommended_number : unit -> int
type t = unit Domain.t
val get_id : t -> int
val spawn : (unit -> unit) -> t
val relax : unit -> unit
val join : 'a Domain.t -> 'a
val is_main_domain : unit -> bool