You can search for identifiers within the package.
in-package search v0.2.0
module H : Core_kernel.Std.Hashtbl.Key
type 'a node
val create : 'a option -> 'a node
val get : 'a node -> H.t list -> 'a option
val set : 'a node -> H.t list -> 'a -> unit
val unset : 'a node -> H.t list -> unit
val sub : 'a node -> H.t list -> 'a node option