You can search for identifiers within the package.
in-package search v0.2.0
coq-serapi.serlib
Serlib.Ser_nametab
type object_prefix = Nametab.object_prefix
val sexp_of_object_prefix : object_prefix -> Sexplib0.Sexp.t
val object_prefix_of_sexp : Sexplib0.Sexp.t -> object_prefix