*
   * @throws NullPointerException if any of {@code elements} is null
   */
  public static <E> ImmutableSet<E> copyOf(Iterable<? extends E> elements) {
    return (elements instanceof Collection)
        ? copyOf((Collection<? extends E>) elements)
        : copyOf(elements.iterator());
  }

  /**
   * Returns an immutable set containing each of {@code elements}, minus duplicates, in the order

  interface StrongValueEntry<K, V, E extends InternalEntry<K, V, E>>
      extends InternalEntry<K, V, E> {}

  /** Marker interface for {@link InternalEntry} implementations for weak values. */
  interface WeakValueEntry<K, V, E extends InternalEntry<K, V, E>> extends InternalEntry<K, V, E> {
    /** Gets the weak value reference held by entry. */

     * @param action     the action to execute
     * @param request    the action request
     * @return a future for the action response
     */
    @Override
    public <Request extends ActionRequest, Response extends ActionResponse> ActionFuture<Response> execute(
            final ActionType<Response> action, final Request request) {
        return client.execute(action, request);
    }

    /**

* Display line number on JSON errors ([#25038](https://github.com/kubernetes/kubernetes/pull/25038), [@mfojtik](https://github.com/mfojtik))
* If the cluster node count exceeds the GCE TargetPool maximum (currently 1000), ([#25178](https://github.com/kubernetes/kubernetes/pull/25178), [@zmerlynn](https://github.com/zmerlynn))
    * randomly select which nodes are members of Kubernetes External Load Balancers.

- Fixed panic in Job controller when `podRecreationPolicy: Failed` is used, and the number of terminating pods exceeds parallelism. ([#121147](https://github.com/kubernetes/kubernetes/pull/121147), [@kannon92](https://github.com/kannon92))

failures in a reconciliation cycle, all the failures are taken into account to compute the back-off. Previously, the back-off kicked in for all types of failures; with this change, only pod failures are taken into account. If the back-off limits exceeds, the job is marked as failed immediately; before this change, the job is marked as failed in the next back-off. ([#114768](https://github.com/kubernetes/kubernetes/pull/114768), [@sathyanarays](https://github.com/sathyanarays)) [SIG Apps and Testing]...

- Kubectl version changed to write a warning message to stderr if the client and server version difference exceeds the supported version skew of +/-1 minor version. ([#98250](https://github.com/kubernetes/kubernetes/pull/98250), [@brianpursley](https://github.com/brianpursley)) [SIG CLI]

- If the user specifies an invalid timeout in the request URL, the request will be aborted with an HTTP 400.
  - If the user specifies a timeout in the request URL that exceeds the maximum request deadline allowed by the apiserver, the request will be aborted with an HTTP 400. ([#96061](https://github.com/kubernetes/kubernetes/pull/96061), [@tkashem](https://github.com/tkashem)) [SIG API Machinery, Network and Testing]

- Added `ServedVersions` field to `StorageVersion` API. ([#118386](https://github.com/k...

- DRA: when the prioritized list feature is used in a request and the resulting number of allocated devices exceeds the number of allowed devices per claim, the scheduler aborts the attempt to allocate devices early. Previously it tried to many different combinations, which can take a long time. ([#130593](https://github.com/kubernetes/kubernetes/pull/130593),...