You can search for identifiers within the package.
in-package search v0.2.0
type 'a uref
val uref : 'a -> 'a uref
val equal : ('a uref * 'a uref) -> bool
val deref : 'a uref -> 'a
val update : ('a uref * 'a) -> unit
val unify : (('a * 'a) -> 'a) -> ('a uref * 'a uref) -> unit
val union : ('a uref * 'a uref) -> unit