You can search for identifiers within the package.
in-package search v0.2.0
type 'a t
val root : 'a -> 'a t
val find : 'a t -> 'a * 'a t
val union : ('a -> 'a -> 'a) -> 'a t -> 'a t -> unit
val set_root : 'a t -> 'a -> unit