You can search for identifiers within the package.
in-package search v0.2.0
type ('s, 'a) t =
| V : ('s -> 'a * 'r) * (('a * 'r) -> 's) -> ('s, 'a) t
val v : ('a -> 'b * 'r) -> (('b * 'r) -> 'a) -> ('a, 'b) t
val get : ('a, 'b) t -> 'a -> 'b
val set : ('a, 'b) t -> 'a -> 'b -> 'a
val id : 'a -> 'a
val fst : ('a * 'b, 'a) t
val snd : ('a * 'b, 'b) t
val head : ('a list, 'a) t
val splice_out : 'a list -> int -> 'a list * 'a list
val nth : int -> ('a list, 'a) t
val (>>) : ('a, 'b) t -> ('b, 'c) t -> ('a, 'c) t