You can search for identifiers within the package.
in-package search v0.2.0
module H : Hashtbl.HashedType
type key = H.t
type 'a t
val create : int -> 'a t
val replace : 'a t -> key -> 'a -> unit
val remove : 'a t -> key -> unit
val find : 'a t -> key -> 'a
val mem : 'a t -> key -> bool
val iter : (key -> 'a -> unit) -> 'a t -> unit
val clear : 'a t -> unit
val length : 'a t -> int