in, out := &in.Selector, &out.Selector
		*out = make(map[string]string, len(*in))
		for key, val := range *in {
			(*out)[key] = val
		}
	}
	if in.ClusterIPs != nil {
		in, out := &in.ClusterIPs, &out.ClusterIPs
		*out = make([]string, len(*in))
		copy(*out, *in)
	}
	if in.IPFamilies != nil {
		in, out := &in.IPFamilies, &out.IPFamilies
		*out = make([]IPFamily, len(*in))

		in, out := &in.Selector, &out.Selector
		*out = make(map[string]string, len(*in))
		for key, val := range *in {
			(*out)[key] = val
		}
	}
	if in.ClusterIPs != nil {
		in, out := &in.ClusterIPs, &out.ClusterIPs
		*out = make([]string, len(*in))
		copy(*out, *in)
	}
	if in.ExternalIPs != nil {
		in, out := &in.ExternalIPs, &out.ExternalIPs
		*out = make([]string, len(*in))

      },
      "io.k8s.api.networking.v1alpha1.ServiceCIDR": {
        "description": "ServiceCIDR defines a range of IP addresses using CIDR format (e.g. 192.168.0.0/24 or 2001:db2::/64). This range is used to allocate ClusterIPs to Service objects.",
        "properties": {
          "apiVersion": {

	out.Ports = *(*[]core.ServicePort)(unsafe.Pointer(&in.Ports))
	out.Selector = *(*map[string]string)(unsafe.Pointer(&in.Selector))
	out.ClusterIP = in.ClusterIP
	out.ClusterIPs = *(*[]string)(unsafe.Pointer(&in.ClusterIPs))
	out.Type = core.ServiceType(in.Type)
	out.ExternalIPs = *(*[]string)(unsafe.Pointer(&in.ExternalIPs))
	out.SessionAffinity = core.ServiceAffinity(in.SessionAffinity)

Using NodeLocal DNSCache in Kubernetes clusters(https://kubernetes.io/docs/tasks/administer-cluster/nodelocaldns/).
This addon runs a node-local-dns pod on all cluster nodes. The pod runs CoreDNS as the dns cache. It runs with `hostNetwork:True` and creates a dedicated dummy interface with a link local ip(169.254.20.10/32 by default) to listen for DNS queries. The cache instances connect to clusterDNS in case of cache misses.

	iptablestest "k8s.io/kubernetes/pkg/util/iptables/testing"
	netutils "k8s.io/utils/net"
	"k8s.io/utils/ptr"
)

// Conventions for tests using NewFakeProxier:
//
// Pod IPs:             10.0.0.0/8
// Service ClusterIPs:  172.30.0.0/16
// Node IPs:            192.168.0.0/24
// Local Node IP:       192.168.0.2
// Service ExternalIPs: 192.168.99.0/24
// LoadBalancer IPs:    1.2.3.4, 5.6.7.8, 9.10.11.12
// Non-cluster IPs:     203.0.113.0/24

// For each TPU cluster in `module`, walk over all ops inside the cluster
// and reachable in the call graph from the cluster.
// For each op walked, `callback` is applied to the op, the root cluster, and
// the root cluster's host device. `callback` returning WasInterrupted
// indicates failure.
// The host device is null when the tpu_cluster HasModelParallelism: The
// HasModelParallelism case is currently unsupported in combination with

func validateClusterCA(insecureConfig *clientcmdapi.Config, pubKeyPins *pubkeypin.Set) ([]byte, error) {
	var clusterCABytes []byte
	for _, cluster := range insecureConfig.Clusters {
		clusterCABytes = cluster.CertificateAuthorityData
	}

	clusterCAs, err := certutil.ParseCertsPEM(clusterCABytes)
	if err != nil {
		return nil, errors.Wrapf(err, "failed to parse cluster CA from the %s ConfigMap", bootstrapapi.ConfigMapClusterInfo)

			expectedError: true,
		},
	}

	for _, tc := range testCases {
		t.Run(tc.desc, func(t *testing.T) {
			if tc.hasClusterDNS {
				configurer.clusterDNS = testClusterDNS
			} else {
				configurer.clusterDNS = nil
			}
			pod.Spec.DNSPolicy = tc.dnsPolicy
			pod.Spec.HostNetwork = tc.hostNetwork

			resType, err := getPodDNSType(pod)
			if tc.expectedError {
				if err == nil {

          return mlir::failure();
      }
    }
    return success();
  }

  ClusterMap clusters;
  result = CollectAndGroupClusterOps(block, &clusters);
  if (failed(result)) return result;

  for (const auto& cluster_metadata_and_ops : clusters) {
    const auto& cluster_ops = cluster_metadata_and_ops.getSecond();

    auto cluster_metadata =