You can search for identifiers within the package.
in-package search v0.2.0
module O : OUTPUT
include OUTPUT with type oc = O.oc
type oc = O.oc
val write : oc -> string -> unit Lwt.t
val write_sep : oc -> unit Lwt.t
val write_lexeme : oc -> lexeme -> unit Lwt.t
val encode : oc -> t -> unit Lwt.t