assertRoute(selection1.next(), address, proxyA, dns.lookup(PROXY_A_HOST, 1), PROXY_A_PORT)
    dns.assertRequests(PROXY_A_HOST)
    assertThat(selection1.hasNext()).isFalse()

    // Next try the IP address of the second proxy.
    assertThat(routeSelector.hasNext()).isTrue()
    dns[PROXY_B_HOST] = dns.allocate(1)
    val selection2 = routeSelector.next()

// returns true if object was modified after givenTime.
func ifModifiedSince(objTime time.Time, givenTime time.Time) bool {
	// The Date-Modified header truncates sub-second precision, so
	// use mtime < t+1s instead of mtime <= t to check for unmodified.
	return objTime.After(givenTime.Add(1 * time.Second))
}

// canonicalizeETag returns ETag with leading and trailing double-quotes removed,
// if any present
func canonicalizeETag(etag string) string {

	// This goroutine owns the cache.
	var saverWg sync.WaitGroup
	saverWg.Add(1)
	go func() {
		// Add jitter to the update time so multiple sets don't sync up.
		updateTime := 30*time.Second + time.Duration(float64(10*time.Second)*rand.Float64())
		t := time.NewTicker(updateTime)
		defer t.Stop()
		defer saverWg.Done()
		var lastSave time.Time

		for {
			select {
			case <-t.C:

			go mc.setErr(err.Error())
			cancel()
		}
	}()

	defer cancel()
	// Save continuous updates
	go func() {
		var err error
		ticker := time.NewTicker(10 * time.Second)
		defer ticker.Stop()
		var exit bool
		for !exit {
			select {
			case <-ticker.C:
			case <-ctx.Done():
				exit = true
			}
			metaMu.Lock()
			meta := *mc.meta

     *
     * @param first the first version.
     * @param second the second version.
     * @return negative if the first version is newer than the second version, zero if they are the same or positive if
     * the second version is the newer.
     */
    private static int compareModelVersions(String first, String second) {
        // we use a dedicated comparator because we control our model version scheme.

	netns2 := p.UpsertPodCacheWithNetns(string(pod.UID), wl2)
	if netns2 != ns {
		t.Fatalf("Expected the original Netns for the same uid, got %p and %p", netns2, ns)
	}
	if !ns2.closed.Load() {
		t.Fatal("Expected the second Netns to be closed")
	}
}

func TestDoubleTake(t *testing.T) {
	p := newPodNetnsCache(openNsTestOverride)

	pod := &corev1.Pod{ObjectMeta: metav1.ObjectMeta{UID: "testUID"}}
	ns := newFakeNs(inc())

    Map<K, V> delegateMap = Maps.newHashMapWithExpectedSize(n);
    // If duplicates are allowed, this map will track the last value for each duplicated key.
    // A second pass will retain only the first entry for that key, but with this last value. The
    // value will then be replaced by null, signaling that later entries with the same key should
    // be deleted.

			},
		},
		false,
		-1,
	},
	{
		"Standard Claims",
		"",
		defaultKeyFunc,
		&StandardClaims{
			StandardClaims: jwt.StandardClaims{
				ExpiresAt: time.Now().Add(time.Second * 10).Unix(),
			},
		},
		true,
		0,
	},
}

func mapClaimsToken(claims *MapClaims) string {
	claims.SetAccessKey("test")
	j := jwt.NewWithClaims(jwt.SigningMethodHS512, claims)

            ImmutableSet.of(
                // DurationSpec.of(500, MILLISECONDS),
                DurationSpec.of(1, SECONDS), DurationSpec.of(1, DAYS)))
        .withExpireAfterAccesses(
            ImmutableSet.of(
                // DurationSpec.of(500, MILLISECONDS),
                DurationSpec.of(1, SECONDS), DurationSpec.of(1, DAYS)))
        .withRefreshes(
            ImmutableSet.of(

				runAllIAMConcurrencyTests(testCase, &check{t, testCase.serverType})
			},
		)
	}
}

func (s *TestSuiteIAM) TestDeleteUserRace(c *check) {
	ctx, cancel := context.WithTimeout(context.Background(), 90*time.Second)
	defer cancel()

	bucket := getRandomBucketName()
	err := s.client.MakeBucket(ctx, bucket, minio.MakeBucketOptions{})
	if err != nil {
		c.Fatalf("bucket creat error: %v", err)
	}

	// Create a policy policy