You can search for identifiers within the package.
in-package search v0.2.0
If applied generatively, i.e. Id(struct end), creates a new type of identifiers.
Id(struct end)
module E : sig ... end
include BaseId
type t
val equal : t -> t -> bool
val compare : t -> t -> int
val hash : t -> int
val name : t -> string option
val to_string : t -> string
val output : out_channel -> t -> unit
val print : Format.formatter -> t -> unit
val create : ?name:string -> unit -> t