public void testWarmUp() {
    RateLimiter limiter = RateLimiter.create(2.0, 4000, MILLISECONDS, 3.0, stopwatch);
    for (int i = 0; i < 8; i++) {
      limiter.acquire(); // #1
    }
    stopwatch.sleepMillis(500); // #2: to repay for the last acquire
    stopwatch.sleepMillis(4000); // #3: becomes cold again
    for (int i = 0; i < 8; i++) {
      limiter.acquire(); // // #4
    }

  public void testWarmUp() {
    RateLimiter limiter = RateLimiter.create(2.0, 4000, MILLISECONDS, 3.0, stopwatch);
    for (int i = 0; i < 8; i++) {
      limiter.acquire(); // #1
    }
    stopwatch.sleepMillis(500); // #2: to repay for the last acquire
    stopwatch.sleepMillis(4000); // #3: becomes cold again
    for (int i = 0; i < 8; i++) {
      limiter.acquire(); // // #4
    }

            103, 48, 46, 98, 49, 160, 102, 50, 118, 121, 107, 44, 119, 45, 58, 51, 53, 52, 57, 56,
            106, 54, 122, 55, 47, 41, 40, 124, 120, 1103, 1072, 1086, 113, 1080, 1575, 1077, 1085,
            1090, 12540, 1088, 12398, 95, 1089, 39, 1604, 33, 233, 12290, 30340, 1083, 1074, 12289,
            12531, 1082, 12356, 34, 3634, 91, 93, 63, 62, 1076, 225, 1605, 1084, 3609, 1610, 12395,

            103, 48, 46, 98, 49, 160, 102, 50, 118, 121, 107, 44, 119, 45, 58, 51, 53, 52, 57, 56,
            106, 54, 122, 55, 47, 41, 40, 124, 120, 1103, 1072, 1086, 113, 1080, 1575, 1077, 1085,
            1090, 12540, 1088, 12398, 95, 1089, 39, 1604, 33, 233, 12290, 30340, 1083, 1074, 12289,
            12531, 1082, 12356, 34, 3634, 91, 93, 63, 62, 1076, 225, 1605, 1084, 3609, 1610, 12395,

        .withValueStrengths(ImmutableSet.copyOf(Strength.values()))
        .withConcurrencyLevels(ImmutableSet.of(1, 4, 16, 64))
        .withMaximumSizes(ImmutableSet.of(400, 1000))
        .withInitialCapacities(ImmutableSet.of(0, 1, 10, 100, 1000))
        .withExpireAfterWrites(
            ImmutableSet.of(
                // DurationSpec.of(500, MILLISECONDS),