You can search for identifiers within the package.
in-package search v0.2.0
val init' : ?backlog:'a -> ?stop:'b -> ?timeout:'c -> 'd -> 'e -> 'f -> 'g Lwt.t
val init : ?backlog:'a -> certfile:'b -> keyfile:'c -> ?stop:'d -> ?timeout:'e -> 'f -> 'g -> 'h Lwt.t