You can search for identifiers within the package.
in-package search v0.2.0
type t = private string
include sig ... end
val t_of_sexp : Ppx_sexp_conv_lib.Sexp.t -> t
val sexp_of_t : t -> Ppx_sexp_conv_lib.Sexp.t
val to_string : t -> string
val of_string : string -> t