private val client: OkHttpClient

  init {
    // This implementation just embeds the PEM files in Java strings; most applications will
    // instead read this from a resource file that gets bundled with the application.
    val certificates =
      HandshakeCertificates.Builder()
        .addTrustedCertificate(letsEncryptCertificateAuthority)
        .addTrustedCertificate(entrustRootCertificateAuthority)

    checkFromStringCase("[]:80", 1, null, 99, false);
    checkFromStringCase("[]bad", 1, null, 99, false);
  }

  public void testFromStringParseableNonsense() {
    // Examples of nonsense that gets through.
    checkFromStringCase("[[:]]", 86, "[:]", 86, false);
    checkFromStringCase("x:y:z", 87, "x:y:z", 87, false);
    checkFromStringCase("", 88, "", 88, false);
    checkFromStringCase(":", 99, "", 99, false);

      WeakReference<Object> garbage = new WeakReference<>(new Object());
      GcFinalization.awaitClear(garbage);
      assertNotNull(weakRef.get());
    }
  }

  public void testMaximalWeakStripedLock() {
    Striped<Lock> stripedLock = Striped.lazyWeakLock(Integer.MAX_VALUE);
    for (int i = 0; i < 10000; i++) {
      stripedLock.get(new Object()).lock();
      // nothing special (e.g. an exception) happens

      WeakReference<Object> garbage = new WeakReference<>(new Object());
      GcFinalization.awaitClear(garbage);
      assertNotNull(weakRef.get());
    }
  }

  public void testMaximalWeakStripedLock() {
    Striped<Lock> stripedLock = Striped.lazyWeakLock(Integer.MAX_VALUE);
    for (int i = 0; i < 10000; i++) {
      stripedLock.get(new Object()).lock();
      // nothing special (e.g. an exception) happens

    int slen = s.length();

    // Get a destination buffer and setup some loop variables.
    char[] dest = Platform.charBufferFromThreadLocal();
    int destSize = dest.length;
    int destIndex = 0;
    int lastEscape = 0;

    // Loop through the rest of the string, replacing when needed into the
    // destination buffer, which gets grown as needed as well.
    for (; index < slen; index++) {

var getFirstPodFunc func(client corev1client.PodsGetter, namespace string, selector string, timeout time.Duration,
	sortBy func([]*corev1.Pod) sort.Interface) (*corev1.Pod, int, error)

// InferPodInfoFromTypedResource gets a pod name, from an expression like Deployment/httpbin, or Deployment/productpage-v1.bookinfo
func InferPodInfoFromTypedResource(name, defaultNS string, factory cmdutil.Factory) (string, string, error) {

						Curr: hs.latency.curr,
						Avg:  hs.latency.avg,
						Max:  hs.latency.peak,
					}
				}
				targets = append(targets, t.Clone())
			}
		}
	}
	return
}

// ListBucketTargets - gets list of bucket targets for this bucket.
func (sys *BucketTargetSys) ListBucketTargets(ctx context.Context, bucket string) (*madmin.BucketTargets, error) {
	sys.RLock()
	defer sys.RUnlock()

		if err != nil {
			reply[index].Errors = []string{fmt.Sprintf("%s: %s (rpc)", sys.peerClients[index].String(), err.Error())}
		}
	}
	return reply
}

// GetResourceMetrics - gets the resource metrics from all nodes excluding self.
func (sys *NotificationSys) GetResourceMetrics(ctx context.Context) <-chan MetricV2 {
	if sys == nil {
		return nil
	}
	g := errgroup.WithNErrs(len(sys.peerClients))

   *     message is formed by replacing each {@code %s} placeholder in the template with an
   *     argument. These are matched by position - the first {@code %s} gets {@code
   *     errorMessageArgs[0]}, etc. Unmatched arguments will be appended to the formatted message in
   *     square braces. Unmatched placeholders will be left as-is.

In the next chapters you will see how to add security to your API using those tools provided by **FastAPI**.