You can search for identifiers within the package.
in-package search v0.2.0
type 'a t
val create : ('a -> 'a -> float) -> 'a list -> 'a t
val nearest_neighbor : ('a -> 'a -> float) -> 'a -> 'a t -> float * 'a
val to_list : 'a t -> 'a list
val is_empty : 'a t -> bool