*
     * @param <K> the key type of {@link EnumMap}
     * @param <V> the value type of {@link EnumMap}
     * @param m the {@literal enum} map to be used for initialization
     * @return a new instance of {@link EnumMap}
     * @see EnumMap#EnumMap(EnumMap)
     */
    public static <K extends Enum<K>, V> EnumMap<K, V> newEnumMap(final EnumMap<K, ? extends V> m) {

    // Add an uncommitted entry. This will get detected on initialization, and the cache will
    // attempt to delete the file. Do not explicitly close the cache here so the entry is left as
    // incomplete.
    val creator = cache.edit("k1")!!
    creator.newSink(0).buffer().use {
      it.writeUtf8("Hello")
    }

    // Simulate a severe Filesystem failure on the first initialization.

  }

  static final Ticker NULL_TICKER =
      new Ticker() {
        @Override
        public long read() {
          return 0;
        }
      };

  // We use a holder class to delay initialization: https://github.com/google/guava/issues/6566
  private static final class LoggerHolder {
    static final Logger logger = Logger.getLogger(CacheBuilder.class.getName());
  }

  static final int UNSET_INT = -1;

### Other notable changes

* federation: fix dns provider initialization issues ([#27252](https://github.com/kubernetes/kubernetes/pull/27252), [@mfanjie](https://github.com/mfanjie))