You can search for identifiers within the package.
in-package search v0.2.0
type t
val empty_vcard : t
val append_content_line : t -> Content_line.t -> t
val append : t -> ?group:Group.t -> Name.t -> Parameter.t list -> Value.t -> t
val append_photo : t -> ?group:Group.t -> string -> string -> t
val append_photo_from_file : t -> ?group:Group.t -> string -> string -> t
val print : (string -> unit) -> t -> unit