* the head of the list.
   */

  /** Returns the time that this entry was last accessed, in ns. */
  @SuppressWarnings("GoodTime")
  long getAccessTime();

  /** Sets the entry access time in ns. */
  @SuppressWarnings("GoodTime") // b/122668874
  void setAccessTime(long time);

  /** Returns the next entry in the access queue. */
  ReferenceEntry<K, V> getNextInAccessQueue();

  }

  /**
   * Invokes {@code latch.}{@link CountDownLatch#await(long, TimeUnit) await(timeout, unit)}
   * uninterruptibly.
   */
  @J2ktIncompatible
  @GwtIncompatible // concurrency
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  public static boolean awaitUninterruptibly(CountDownLatch latch, long timeout, TimeUnit unit) {
    boolean interrupted = false;
    try {

  /** Advances the ticker value by {@code time} in {@code timeUnit}. */
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  @CanIgnoreReturnValue
  public FakeTicker advance(long time, TimeUnit timeUnit) {
    return advance(timeUnit.toNanos(time));
  }

  /** Advances the ticker value by {@code nanoseconds}. */
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  @CanIgnoreReturnValue

   * the head of the list.
   */

  /** Returns the time that this entry was last accessed, in ns. */
  @SuppressWarnings("GoodTime")
  long getAccessTime();

  /** Sets the entry access time in ns. */
  @SuppressWarnings("GoodTime") // b/122668874
  void setAccessTime(long time);

  /** Returns the next entry in the access queue. */
  ReferenceEntry<K, V> getNextInAccessQueue();

  public void enter() {
    lock.lock();
  }

  /**
   * Enters this monitor. Blocks at most the given time.
   *
   * @return whether the monitor was entered
   */
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  public boolean enter(long time, TimeUnit unit) {
    final long timeoutNanos = toSafeNanos(time, unit);
    final ReentrantLock lock = this.lock;
    if (!fair && lock.tryLock()) {

   * @since 10.0
   */
  public static Ticker systemTicker() {
    return SYSTEM_TICKER;
  }

  private static final Ticker SYSTEM_TICKER =
      new Ticker() {
        @Override
        @SuppressWarnings("GoodTime") // reading system time without TimeSource
        public long read() {
          return System.nanoTime();
        }
      };

  /** Advances the ticker value by {@code time} in {@code timeUnit}. */
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  @CanIgnoreReturnValue
  public FakeTicker advance(long time, TimeUnit timeUnit) {
    return advance(timeUnit.toNanos(time));
  }

  /** Advances the ticker value by {@code nanoseconds}. */
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  @CanIgnoreReturnValue

@ElementTypesAreNonnullByDefault
public final class CacheStats {
  private final long hitCount;
  private final long missCount;
  private final long loadSuccessCount;
  private final long loadExceptionCount;

  @SuppressWarnings("GoodTime") // should be a java.time.Duration
  private final long totalLoadTime;

  private final long evictionCount;

  /**
   * Constructs a new {@code CacheStats} instance.
   *

@ElementTypesAreNonnullByDefault
public final class CacheStats {
  private final long hitCount;
  private final long missCount;
  private final long loadSuccessCount;
  private final long loadExceptionCount;

  @SuppressWarnings("GoodTime") // should be a java.time.Duration
  private final long totalLoadTime;

  private final long evictionCount;

  /**
   * Constructs a new {@code CacheStats} instance.
   *

  @CheckForNull Strength keyStrength;
  @CheckForNull Strength valueStrength;

  @SuppressWarnings("GoodTime") // should be a java.time.Duration
  long expireAfterWriteNanos = UNSET_INT;

  @SuppressWarnings("GoodTime") // should be a java.time.Duration
  long expireAfterAccessNanos = UNSET_INT;

  @SuppressWarnings("GoodTime") // should be a java.time.Duration
  long refreshNanos = UNSET_INT;