You can search for identifiers within the package.
in-package search v0.2.0
type 'a elem
val make : 'a -> 'a elem
note: in functions find, eq, and get, 'modifies' accounts for path compression
val find : 'a elem -> 'a elem
val eq : 'a elem -> 'a elem -> bool
val get : 'a elem -> 'a
val set : 'a elem -> 'a -> unit
val union : 'a elem -> 'a elem -> unit