*/
    protected ThreadUtil() {
    }

    /**
     * Causes the currently executing thread to sleep (temporarily cease execution) for the specified number of milliseconds.
     *
     * @param millis
     *            the length of time to sleep in milliseconds
     * @throws InterruptedRuntimeException
     *             if any thread has interrupted the current thread.
     */
    public static void sleep(final long millis) {

        if (delay > 0) {
            ThreadUtil.sleep(delay);
        }
    }

    /**
     * Calculates the delay in milliseconds based on current time and configured rules.
     * The method checks each rule to see if it applies to the current time and day.
     *
     * @return the delay in milliseconds, or 0 if no rules apply
     */
    protected long getDelay() {
        if (ruleList.isEmpty()) {
            return 0;

        this.responseSequenceNumber = responseSequenceNumber;
    }

    /**
     * Gets the heartbeat interval recommended by the server (in milliseconds).
     * The client can use this to adjust the heartbeat frequency.
     *
     * @return the heartbeat interval in milliseconds
     */
    public long getHeartbeatInterval() {
        return heartbeatInterval;
    }

    /**
     * Sets the heartbeat interval.

  }

  public void testElapsed_millis() {
    stopwatch.start();
    ticker.advance(999999);
    assertEquals(0, stopwatch.elapsed(MILLISECONDS));
    ticker.advance(1);
    assertEquals(1, stopwatch.elapsed(MILLISECONDS));
  }

  @J2ktIncompatible // TODO(b/259213718): Switch J2kt to String.format("%.4g") once that's supported
  public void testToString() {
    stopwatch.start();

     */
    private final byte[] fileId;

    /**
     * The type of handle (DURABLE_V1, DURABLE_V2, or PERSISTENT)
     */
    private final HandleType type;

    /**
     * The timeout in milliseconds for durable handles (not applicable for persistent handles)
     */
    private final long timeout;

    /**
     * The timestamp when this handle was created
     */
    private final long createTime;

    assertEquals(0, stats.hitCount());

    ticker.advance(1, MILLISECONDS);
    assertSame(one, cache.getUnchecked(key));
    stats = cache.stats();
    assertEquals(1, stats.missCount());
    assertEquals(1, stats.loadSuccessCount());
    assertEquals(0, stats.loadExceptionCount());
    assertEquals(1, stats.hitCount());

    ticker.advance(1, MILLISECONDS);
    assertSame(two, cache.getUnchecked(key));

      Stopwatch timer = Stopwatch.createStarted();

      int drained = drain(q, new ArrayList<>(), 2, 10, MILLISECONDS, interruptibly);
      assertThat(drained).isAtMost(1);

      assertThat(timer.elapsed(MILLISECONDS)).isAtLeast(10L);

      // If even the first one wasn't there, clean up so that the next test doesn't see an element.
      producerThread.cancel(true);
      producer.doneProducing.await();

    assertThrows(
        IllegalArgumentException.class,
        () -> Suppliers.memoizeWithExpiration(() -> "", 0, MILLISECONDS));

    assertThrows(
        IllegalArgumentException.class,
        () -> Suppliers.memoizeWithExpiration(() -> "", -1, MILLISECONDS));
  }

  @J2ktIncompatible // Duration
  @GwtIncompatible // Duration

     *
     * @return the creation time in milliseconds since epoch
     */
    long createTime();

    /**
     * Gets the last modified time.
     *
     * @return the last modified time in milliseconds since epoch
     */
    long lastModified();

    /**
     * Gets the last access time.
     *
     * @return the last access time in milliseconds since epoch
     */
    long lastAccess();

        .build()

    // Copy to customize OkHttp for this request.
    val client1 =
      client
        .newBuilder()
        .readTimeout(500, TimeUnit.MILLISECONDS)
        .build()
    try {
      client1.newCall(request).execute().use { response ->
        println("Response 1 succeeded: $response")
      }
    } catch (e: IOException) {