You can search for identifiers within the package.
in-package search v0.2.0
module Sexpable : S1
module M : sig ... end
include sig ... end
val t_of_sexp : (Sexp.t -> 'a) -> Sexp.t -> 'a M.t
val sexp_of_t : ('a -> Sexp.t) -> 'a M.t -> Sexp.t