You can search for identifiers within the package.
in-package search v0.2.0
type t = {
level : int;
text : string;
target : Pdfdest.t;
isopen : bool;
}
val string_of_bookmark : t -> string
val read_bookmarks : Pdf.t -> t list
val remove_bookmarks : Pdf.t -> Pdf.t
val add_bookmarks : t list -> Pdf.t -> Pdf.t