You can search for identifiers within the package.
in-package search v0.2.0
type ('a, 'b) t
val create : int -> ('a, 'b) t
val add : ('a, 'b) t -> 'a -> 'b -> unit
val find : ('a, 'b) t -> 'a -> 'b
val iter : ('a -> 'b -> unit) -> ('a, 'b) t -> unit