}); err != nil {
		return err
	}
	if err := s.AddGeneratedConversionFunc((*v1.PodIP)(nil), (*core.PodIP)(nil), func(a, b interface{}, scope conversion.Scope) error {
		return Convert_v1_PodIP_To_core_PodIP(a.(*v1.PodIP), b.(*core.PodIP), scope)
	}); err != nil {
		return err
	}
	if err := s.AddGeneratedConversionFunc((*core.PodIP)(nil), (*v1.PodIP)(nil), func(a, b interface{}, scope conversion.Scope) error {

	// all PodIPs must be valid IPs
	for i, podIP := range pod.Status.PodIPs {
		allErrs = append(allErrs, validation.IsValidIP(podIPsField.Index(i), podIP.IP)...)
	}

	// if we have more than one Pod.PodIP then
	// - validate for dual stack
	// - validate for duplication
	if len(pod.Status.PodIPs) > 1 {
		podIPs := make([]string, 0, len(pod.Status.PodIPs))
		for _, podIP := range pod.Status.PodIPs {

	// podIP address allocated to the pod. Routable at least within the cluster.
	// Empty if not yet allocated.
	// +optional
	PodIP string `json:"podIP,omitempty" protobuf:"bytes,6,opt,name=podIP"`

	// podIPs holds the IP addresses allocated to the pod. If this field is specified, the 0th entry must

  // +listType=atomic
  repeated HostIP hostIPs = 16;

  // podIP address allocated to the pod. Routable at least within the cluster.
  // Empty if not yet allocated.
  // +optional
  optional string podIP = 6;

  // podIPs holds the IP addresses allocated to the pod. If this field is specified, the 0th entry must
  // match the podIP field. Pods may be allocated at most 1 value for each of IPv4 and IPv6. This list

	"podIP":                      "podIP address allocated to the pod. Routable at least within the cluster. Empty if not yet allocated.",

  // +optional
  optional string podIP = 6;

  // podIPs holds the IP addresses allocated to the pod. If this field is specified, the 0th entry must
  // match the podIP field. Pods may be allocated at most 1 value for each of IPv4 and IPv6. This list
  // is empty if no IPs have been allocated yet.
  // +optional
  // +patchStrategy=merge
  // +patchMergeKey=ip
  repeated PodIP podIPs = 12;

					}}
				}),
			)

			fp.syncProxyRules()

			var podIP, externalClientIP, nodeIP, altNodeIP, localhostIP string
			if tc.family == v1.IPv4Protocol {
				podIP = "10.0.0.2"
				externalClientIP = testExternalClient
				nodeIP = testNodeIP
				altNodeIP = testNodeIPAlt
				localhostIP = "127.0.0.1"
			} else {
				podIP = "fd00:10::2"
				externalClientIP = "2600:5200::1"

// PodDNSConfigOption defines DNS resolver options of a pod.
type PodDNSConfigOption struct {
	// Required.
	Name string
	// +optional
	Value *string
}

// PodIP represents a single IP address allocated to the pod.
type PodIP struct {
	// IP is the IP address assigned to the pod
	IP string
}

// HostIP represents a single IP address allocated to the host.
type HostIP struct {

		},
		Status: api.PodStatus{
			PodIPs: []api.PodIP{},
		},
	}

	for _, ip := range ips {
		p.Status.PodIPs = append(p.Status.PodIPs, api.PodIP{IP: ip})
	}

	return p
}

func TestServiceRegistryResourceLocation(t *testing.T) {
	pods := []api.Pod{

### Other (Bug, Cleanup or Flake)

- Fixed a regression with clients prior to 1.15 not being able to update podIP in pod status, or podCIDR in node spec, against >= 1.16 API servers ([#88505](https://github.com/kubernetes/kubernetes/pull/88505), [@liggitt](https://github.com/liggitt)) [SIG Apps and Network]