You can search for identifiers within the package.
in-package search v0.2.0
type elt = string
type t
val empty : t
val add : elt -> t -> t
val mem : elt -> t -> bool
val union : t -> t -> t
val of_list : elt list -> t
val iter : (elt -> unit) -> t -> unit
val fold : (elt -> 'a -> 'a) -> t -> 'a -> 'a