}
		if tc.expectStackDowngrade && len(want.Spec.IPFamilies) > len(got.Spec.ClusterIPs) {
			want.Spec.IPFamilies = want.Spec.IPFamilies[0:1]
		} else if len(got.Spec.IPFamilies) > len(want.Spec.IPFamilies) {
			want.Spec.IPFamilies = append(want.Spec.IPFamilies, got.Spec.IPFamilies[len(want.Spec.IPFamilies):]...)
		}
	}

	if tc.expectNodePorts {
		for i := range want.Spec.Ports {

			}
		}
	case len(oldService.Spec.IPFamilies) < len(service.Spec.IPFamilies):
		// something has been added (upgraded)

		// test if primary ipFamily has changed
		if len(oldService.Spec.IPFamilies) > 0 &&
			len(service.Spec.IPFamilies) > 0 &&
			service.Spec.IPFamilies[0] != oldService.Spec.IPFamilies[0] {

	// +optional
	ClusterIPs []string

	// IPFamilies identifies all the IPFamilies assigned for this Service. If a value
	// was not provided for IPFamilies it will be defaulted based on the cluster
	// configuration and the value of service.spec.ipFamilyPolicy. A maximum of two
	// values (dual-stack IPFamilies) are allowed in IPFamilies. IPFamilies field is
	// conditionally mutable: it allows for adding or removing a secondary IPFamily,

	// Valid list items are "IPv4", "IPv6".
	// More info: https://kubernetes.io/docs/concepts/services-networking/dual-stack/#services
	IpFamilies []string `protobuf:"bytes,29,rep,name=ipFamilies,proto3" json:"ipFamilies,omitempty"`
	// Controls whether Services are configured to use IPv4, IPv6, or both. Valid options
	// are PreferDualStack, RequireDualStack, and SingleStack.

	// IPFamilyPolicyRequireDualStack on a single stack cluster will result in validation errors. The
	// IPFamilies (and their order) assigned  to this service is based on service.spec.ipFamilies. If
	// service.spec.ipFamilies was not provided then it will be assigned according to how they are
	// configured on the cluster. If service.spec.ipFamilies has only one entry then the alternative
	// IPFamily will be added by apiserver

  // value.
  //
  // This field may hold a maximum of two entries (dual-stack IPs, in either order).
  // These IPs must correspond to the values of the ipFamilies field. Both
  // clusterIPs and ipFamilies are governed by the ipFamilyPolicy field.
  // More info: https://kubernetes.io/docs/concepts/services-networking/service/#virtual-ips-and-service-proxies
  // +listType=atomic
  // +optional

	"type":                          "type determines how the Service is...

  // value.
  //
  // This field may hold a maximum of two entries (dual-stack IPs, in either order).
  // These IPs must correspond to the values of the ipFamilies field. Both
  // clusterIPs and ipFamilies are governed by the ipFamilyPolicy field.
  // More info: https://kubernetes.io/docs/concepts/services-networking/service/#virtual-ips-and-service-proxies
  // +listType=atomic
  // +optional

	out.PublishNotReadyAddresses = in.PublishNotReadyAddresses
	out.SessionAffinityConfig = (*core.SessionAffinityConfig)(unsafe.Pointer(in.SessionAffinityConfig))
	out.IPFamilies = *(*[]core.IPFamily)(unsafe.Pointer(&in.IPFamilies))
	out.IPFamilyPolicy = (*core.IPFamilyPolicy)(unsafe.Pointer(in.IPFamilyPolicy))
	out.AllocateLoadBalancerNodePorts = (*bool)(unsafe.Pointer(in.AllocateLoadBalancerNodePorts))

  It changes the dual-stack API wrt Service from a single ipFamily field to 3
  fields: ipFamilyPolicy (SingleStack, PreferDualStack, RequireDualStack),
  ipFamilies (a list of families assigned), and clusterIPs (inclusive of
  clusterIP).  Most users do not need to set anything at all, defaulting will
  handle it for them.  Services are single-stack unless the user asks for