return (ReferenceEntry<K, V>) NullEntry.INSTANCE;
  }

  static final Queue<?> DISCARDING_QUEUE =
      new AbstractQueue<Object>() {
        @Override
        public boolean offer(Object o) {
          return true;
        }

        @Override
        public @Nullable Object peek() {
          return null;
        }

        @Override

later.

  However, this bottle was NOT marked `poison,' so Alice ventured
to taste it, and finding it very nice, (it had, in fact, a sort
of mixed flavour of cherry-tart, custard, pine-apple, roast
turkey, toffee, and hot buttered toast,) she very soon finished
it off.

     *       *       *       *       *       *       *

         *       *       *       *       *       *

later.

  However, this bottle was NOT marked `poison,' so Alice ventured
to taste it, and finding it very nice, (it had, in fact, a sort
of mixed flavour of cherry-tart, custard, pine-apple, roast
turkey, toffee, and hot buttered toast,) she very soon finished
it off.

     *       *       *       *       *       *       *

         *       *       *       *       *       *

    HTTP/2 server, close all but the first connection.
 *  Fix: Fail the HTTP/2 connection if first frame isn't `SETTINGS`.
 *  Fix: Forbid spaces in header names.
 *  Fix: Don't offer to do gzip if the request is partial.
 *  Fix: MockWebServer is now usable with JUnit 5. That update [broke the rules][junit_5_rules].
 *  New: Support `Expect: 100-continue` as a request header. Callers can use this header to

    assertThat(response.header("Content-Encoding")).isEqualTo("gzip")
    assertThat(response.body.source().readByteString()).isEqualTo(
      gzippedBody.snapshot(),
    )

    // The request did not offer gzip support.
    val recordedRequest = server.takeRequest()
    assertThat(recordedRequest.headers["Accept-Encoding"]).isNull()
  }

  @Test
  fun asyncResponseCanBeConsumedLater() {

- The `controller.kubernetes.io/pod-deletion-cost` annotation can be set to offer a hint on the cost of deleting a `Pod` compared to other pods belonging to the same ReplicaSet. Pods with lower deletion cost are deleted first. This is an alpha feature. ([#99163](https://github.com/kubernetes/kubernetes/pull/99163), [@ahg-g](htt...

- Added `/sys/devices/virtual/powercap` to default masked paths. It avoids the potential security risk that the ability to read these files may offer a power-based sidechannel attack against any workloads running on the same kernel. ([#125970](https://github.com/kubernetes/kubernetes/pull/125970), [@carlory](https://github.com/carlory))

- Improved logging when volume times out waiting for attach/detach. ([#108628](https://github.com/kubernetes/kubernetes/pull/108628), [@RomanBednar](https://github.com/RomanBednar))
- Improved the rounding of `PodTopologySpread` scores to offer better scoring when spreading a low number of pods. ([#107384](https://github.com/kubernetes/kubernetes/pull/107384), [@sanposhiho](https://github.com/sanposhiho))

### Bug or Regression

- Add `/sys/devices/virtual/powercap` to default masked paths. It avoids the potential security risk that the ability to read these files may offer a power-based sidechannel attack against any workloads running on the same kernel. ([#125970](https://github.com/kubernetes/kubernetes/pull/125970), [@carlory](https://github.com/carlory)) [SIG Node]

### Bug or Regression

- Add `/sys/devices/virtual/powercap` to default masked paths. It avoids the potential security risk that the ability to read these files may offer a power-based sidechannel attack against any workloads running on the same kernel. ([#125970](https://github.com/kubernetes/kubernetes/pull/125970), [@carlory](https://github.com/carlory)) [SIG Node]