* @since 20.0 (present with return type {@link Iterator} since 2.0)
     */
    @Override
    public abstract UnmodifiableIterator<E> iterator();

    @Override
    @SuppressWarnings("EqualsHashCode") // same semantics
    public boolean equals(@Nullable Object object) {
      if (object == this) {
        return true;
      }
      if (!(object instanceof Set)) {
        return false;
      }

 *
 * <h3>Cancelling</h3>
 *
 * Any step in a pipeline can be {@linkplain #cancel(boolean) cancelled}, even after another step
 * has been derived, with the same semantics as cancelling a {@link Future}. In addition, a
 * successfully cancelled step will immediately start closing all objects captured for later closing
 * by it and by its input steps.
 *
 * <h3>Ending a pipeline</h3>
 *

//
// If the BitrotVerifier is not nil or not verified ReadFile
// tries to verify whether the disk has bitrot.
//
// Additionally ReadFile also starts reading from an offset. ReadFile
// semantics are same as io.ReadFull.
func (s *xlStorage) ReadFile(ctx context.Context, volume string, path string, offset int64, buffer []byte, verifier *BitrotVerifier) (int64, error) {
	if offset < 0 {
		return 0, errInvalidArgument

- Improved scheduling performance when many nodes, and prefilter returned 1-2 nodes (e.g. daemonset)
  

## API Changes
- CustomResourceDefinitions now validate documented API semantics of `x-kubernetes-list-type` and `x-kubernetes-map-type` atomic to reject non-atomic sub-types. ([#84722](https://github.com/kubernetes/kubernetes/pull/84722), [@sttts](https://github.com/sttts))

  enabled by default, meaning that API fields no longer allow IP or CIDR
  values with extraneous leading "0"s (e.g., `010.000.000.005` rather than
  `10.0.0.5`) or CIDR subnet/mask values with ambiguous semantics (e.g.,
  `192.168.0.5/24` rather than `192.168.0.0/24` or `192.168.0.5/32`). ([#137053](https://github.com/kubernetes/kubernetes/pull/137053), [@danwinship](https://github.com/danwinship)) [SIG Network and Testing]

## Changes by Kind

### API Change

- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  

proceeded to schedule pods onto nodes with no devices by not allocating any devices for those pods. Kubernetes 1.33 changes that to only picking nodes which have at least one device. Users who want the "proceed with scheduling also without devices" semantic can use the upcoming prioritized list feature with one sub-request for "all" devices and a second alternative with "count: 0". ([#129560](https://github.com/kubernetes/kubernetes/pull/129560), [@bart0sh](https://github.com/bart0sh)) [SIG API Machinery...

### SIG Storage

- The AllowedTopologies field inside StorageClass is now validated against set and map semantics. Specifically, there cannot be duplicate TopologySelectorTerms, MatchLabelExpressions keys, or TopologySelectorLabelRequirement Values. ([#66843](https://github.com/kubernetes/kubernetes/pull/66843), [@verult](https://github.com/verult))

- Changed ownership semantics of PersistentVolume's spec.claimRef from `atomic` to `granular`. ([#110495](https://github.com/kubernetes/kubernetes/pull/110495), [@alexzielenski](https://github.com/alexzielenski))