* int.
     */
    checkNonNegative("a", a);
    checkNonNegative("b", b);
    if (a == 0) {
      // 0 % b == 0, so b divides a, but the converse doesn't hold.
      // BigInteger.gcd is consistent with this decision.
      return b;
    } else if (b == 0) {
      return a; // similar logic
    }
    /*

	WatchRequestWaitGroup *utilwaitgroup.RateLimitedSafeWaitGroup

	// ShutdownDelayDuration allows to block shutdown for some time, e.g. until endpoints pointing to this API server
	// have converged on all node. During this time, the API server keeps serving, /healthz will return 200,
	// but /readyz will return failure.
	ShutdownDelayDuration time.Duration

	// therefore return true.
	LivezGracePeriod time.Duration
	// ShutdownDelayDuration allows to block shutdown for some time, e.g. until endpoints pointing to this API server
	// have converged on all node. During this time, the API server keeps serving, /healthz will return 200,
	// but /readyz will return failure.
	ShutdownDelayDuration time.Duration

	// https://members.loria.fr/PZimmermann/mca/pub226.html
	// If x is one less than a perfect square, the sequence oscillates between the correct z and z+1;
	// otherwise it converges to the correct z and stays there.
	var z1, z2 nat
	z1 = z
	z1 = z1.setUint64(1)
	z1 = z1.shl(z1, uint(x.bitLen()+1)/2) // must be ≥ √x
	for n := 0; ; n++ {
		z2, _ = z2.div(nil, x, z1)

    * [StorageOS](http://www.storageos.com) can be used as a storage provider for Kubernetes.  With StorageOS, capacity from local or attached storage is pooled across the cluster, providing converged infrastructure for cloud-native applications.
* CRI has been moved to package `pkg/kubelet/apis/cri/v1alpha1/runtime`. ([#47113](https://github.com/kubernetes/kubernetes/pull/47113), [@feiskyer](https://github.com/feiskyer))