You can search for identifiers within the package.
in-package search v0.2.0
coq-serapi.serlib
Serlib.Ser_stm
type focus = Stm.focus
val sexp_of_focus : Stm.focus -> Sexplib.Sexp.t
val focus_of_sexp : Sexplib.Sexp.t -> Stm.focus
type add_focus = Stm.add_focus
val sexp_of_add_focus : Stm.add_focus -> Sexplib.Sexp.t
val add_focus_of_sexp : Sexplib.Sexp.t -> Stm.add_focus