You can search for identifiers within the package.
in-package search v0.2.0
type !'a forest = 'a tree list
and !'a tree =
| Seq of 'a * 'a forest
type 'a incr
val to_tree : 'a incr -> 'a forest
val opn : 'a -> 'a incr -> 'a incr
val close : 'a incr -> 'a incr
val leaf : 'a -> 'a incr -> 'a incr