You can search for identifiers within the package.
in-package search v0.2.0
module H : HashedType
type elt = H.t
type t
val create : int -> t
val clear : t -> unit
val copy : t -> t
val add : t -> elt -> unit
val remove : t -> elt -> unit
val mem : t -> elt -> bool
val cardinal : t -> int
val iter : (elt -> unit) -> t -> unit
val fold : (elt -> 'a -> 'a) -> t -> 'a -> 'a