You can search for identifiers within the package.
in-package search v0.2.0
type t
val (+) : t -> t -> t
val test : t -> t -> bool
val eq : t -> t -> bool
val none : t
val reverse_key : t
val dup_sort : t
val dup_fixed : t
val integer_dup : t
val reverse_dup : t
val integer_key : t