private final Stopwatch stopwatch = new Stopwatch(ticker);

  public void testElapsed_duration() {
    stopwatch.start();
    ticker.advance(999999);
    assertEquals(Duration.ofNanos(999999), stopwatch.elapsed());
    ticker.advance(1);
    assertEquals(Duration.ofMillis(1), stopwatch.elapsed());
  }

    try {
      builder.callTimeout(Duration.ofNanos(1))
    } catch (ignored: IllegalArgumentException) {
    }
    try {
      builder.connectTimeout(Duration.ofNanos(1))
    } catch (ignored: IllegalArgumentException) {
    }
    try {
      builder.writeTimeout(Duration.ofNanos(1))
    } catch (ignored: IllegalArgumentException) {
    }
    try {
      builder.readTimeout(Duration.ofNanos(1))

   *
   * @since 22.0 (but only since 33.4.0 in the Android flavor)
   */
  @J2ktIncompatible
  @GwtIncompatible
  @J2ObjCIncompatible
  public Duration elapsed() {
    return Duration.ofNanos(elapsedNanos());
  }

  /** Returns a string representation of the current elapsed time. */
  @Override
  public String toString() {
    long nanos = elapsedNanos();

    TimeUnit unit = chooseUnit(nanos);