* object that equals a set member, but isn't the same instance. This behavior is similar to the
   * way {@code IdentityHashMap} handles key lookups.
   *
   * @since 8.0
   */
  public static <E extends @Nullable Object> Set<E> newIdentityHashSet() {
    return Collections.newSetFromMap(Maps.newIdentityHashMap());
  }

  /**

## Version 3.4.0

_2016-07-08_

 *  New: Support dynamic table size changes to HPACK Encoder.
 *  Fix: Use `TreeMap` in `Headers.toMultimap()`. This makes string lookups on
    the returned map case-insensitive.
 *  Fix: Don't share the OkHttpClient's `Dispatcher` in `HttpURLConnection`.


## Version 3.4.0-RC1

_2016-07-02_

            case NtStatus.NT_STATUS_OBJECT_NAME_NOT_FOUND:
            case NtStatus.NT_STATUS_OBJECT_PATH_NOT_FOUND:
                // Cache negative results to avoid repeated failed lookups
                this.attrExpiration = currentTime + getContext().getConfig().getAttributeCacheTimeout();
                return false;
            default:
                throw se;
            }

* Fixing heapster memory requirements. ([#26109](https://github.com/kubernetes/kubernetes/pull/26109), [@Q-Lee](https://github.com/Q-Lee))
* Handle federated service name lookups in kube-dns. ([#25727](https://github.com/kubernetes/kubernetes/pull/25727), [@madhusudancs](https://github.com/madhusudancs))

- Images for cloud-controller-manager, kube-apiserver, kube-controller-manager, and kube-scheduler now contain a minimal /etc/nsswitch.conf and should respect /etc/hosts for lookups ([#69238](https://github.com/kubernetes/kubernetes/pull/69238), [@BenTheElder](https://github.com/BenTheElder))

### SIG Scheduling

- Changed Job controller to use the controller UID index for Pod lookups to improve performance. ([#132305](https://github.com/kubernetes/kubernetes/pull/132305), [@xigang](https://github.com/xigang))

    /**
     * Returns true if this reference contains an active value, meaning one that is still considered
     * present in the cache. Active values consist of live values, which are returned by cache
     * lookups, and dead values, which have been evicted but awaiting removal. Non-active values
     * consist strictly of loading values, though during refresh a value may be both active and
     * loading.
     */
    boolean isActive();

  const val FLAG_COMPRESSED = 0x20 // Used for data.

  /** Lookup table for valid frame types. */
  private val FRAME_NAMES =
    arrayOf(
      "DATA",
      "HEADERS",
      "PRIORITY",
      "RST_STREAM",
      "SETTINGS",
      "PUSH_PROMISE",
      "PING",
      "GOAWAY",
      "WINDOW_UPDATE",
      "CONTINUATION",
    )

  /**

    static final VarHandle valueUpdater;

    static {
      MethodHandles.Lookup lookup = MethodHandles.lookup();
      try {
        waiterThreadUpdater = lookup.findVarHandle(Waiter.class, "thread", Thread.class);
        waiterNextUpdater = lookup.findVarHandle(Waiter.class, "next", Waiter.class);
        waitersUpdater =
            lookup.findVarHandle(AbstractFutureState.class, "waitersField", Waiter.class);

- Hostnames are now converted to lowercase before being used for node lookups in the kubernetes-worker charm. ([#65487](https://github.com/kubernetes/kubernetes/pull/65487), [@dshcherb](https://github.com/dshcherb))