expr:         `ip("192.168.0.1").family()`,
			expectResult: int4,
		},
		{
			name:         "ipv4 isUnspecified true",
			expr:         `ip("0.0.0.0").isUnspecified()`,
			expectResult: trueVal,
		},
		{
			name:         "ipv4 isUnspecified false",
			expr:         `ip("127.0.0.1").isUnspecified()`,
			expectResult: falseVal,
		},
		{
			name:         "ipv4 isLoopback true",

// ip('::1').family() // returns '6'
// ip('127.0.0.1').family() == 4 // returns true
// ip('::1').family() == 6 // returns true
// ip('0.0.0.0').isUnspecified() // returns true
// ip('127.0.0.1').isUnspecified() // returns false
// ip('::').isUnspecified() // returns true
// ip('::1').isUnspecified() // returns false
// ip('127.0.0.1').isLoopback() // returns true
// ip('192.168.0.1').isLoopback() // returns false

	ipv4Unspecified := net.ParseIP("0.0.0.0")
	ipv4Specified := net.ParseIP("8.8.8.8")

	fmt.Println(ipv6Unspecified.IsUnspecified())
	fmt.Println(ipv6Specified.IsUnspecified())
	fmt.Println(ipv4Unspecified.IsUnspecified())
	fmt.Println(ipv4Specified.IsUnspecified())

	// Output:
	// true
	// false
	// true
	// false
}

func ExampleIP_Mask() {

				}
				if ip.IsPrivate() != stdip.IsPrivate() {
					t.Errorf("Addr.IsPrivate() != net.IP.IsPrivate(): ip=%q stdip=%q", ip, stdip)
				}
				if ip.IsUnspecified() != stdip.IsUnspecified() {
					t.Errorf("Addr.IsUnspecified() != net.IP.IsUnspecified(): ip=%q stdip=%q", ip, stdip)
				}
			}
		}

		// Check that .Next().Prev() and .Prev().Next() preserve the IP.

	})
	wantInlinable := []string{
		"(*uint128).halves",
		"Addr.BitLen",
		"Addr.hasZone",
		"Addr.Is4",
		"Addr.Is4In6",
		"Addr.Is6",
		"Addr.IsInterfaceLocalMulticast",
		"Addr.IsValid",
		"Addr.IsUnspecified",
		"Addr.Less",
		"Addr.Unmap",
		"Addr.Zone",
		"Addr.v4",
		"Addr.v6",
		"Addr.v6u16",
		"Addr.withoutZone",
		"AddrPortFrom",
		"AddrPort.Addr",
		"AddrPort.Port",
		"AddrPort.IsValid",

		// Kubernetes <1.29>:
		"add", "asApproximateFloat", "asInteger", "compareTo", "isGreaterThan", "isInteger", "isLessThan", "isQuantity", "quantity", "sign", "sub",
		// Kubernetes <1.30>:
		"ip", "family", "isUnspecified", "isLoopback", "isLinkLocalMulticast", "isLinkLocalUnicast", "isGlobalUnicast", "ip.isCanonical", "isIP", "cidr", "containsIP", "containsCIDR", "masked", "prefixLength", "isCIDR", "string",
		// Kubernetes <1.??>:
	)

		}
	}
}

var ipAddrScopeTests = []struct {
	scope func(IP) bool
	in    IP
	ok    bool
}{
	{IP.IsUnspecified, IPv4zero, true},
	{IP.IsUnspecified, IPv4(127, 0, 0, 1), false},
	{IP.IsUnspecified, IPv6unspecified, true},
	{IP.IsUnspecified, IPv6interfacelocalallnodes, false},
	{IP.IsUnspecified, nil, false},
	{IP.IsLoopback, IPv4(127, 0, 0, 1), true},
	{IP.IsLoopback, IPv4(127, 255, 255, 254), true},

	IPv6linklocalallrouters    = IP{0xff, 0x02, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x02}
)

// IsUnspecified reports whether ip is an unspecified address, either
// the IPv4 address "0.0.0.0" or the IPv6 address "::".
func (ip IP) IsUnspecified() bool {
	return ip.Equal(IPv4zero) || ip.Equal(IPv6unspecified)
}

// IsLoopback reports whether ip is a loopback address.

			unwrapAddr := ipAddr.Unmap()
			if !unwrapAddr.IsValid() || unwrapAddr.IsLoopback() || unwrapAddr.IsLinkLocalUnicast() || unwrapAddr.IsLinkLocalMulticast() {
				continue
			}
			if unwrapAddr.IsUnspecified() {
				ok = false
				continue
			}
			ipAddresses = append(ipAddresses, unwrapAddr.String())
		}
	}
	return ipAddresses, ok
}

			CertDirectory: "apiserver.local.config/certificates",
		},
	}
}

func (s *SecureServingOptions) DefaultExternalAddress() (net.IP, error) {
	if s.ExternalAddress != nil && !s.ExternalAddress.IsUnspecified() {
		return s.ExternalAddress, nil
	}
	return utilnet.ResolveBindAddress(s.BindAddress)
}

func (s *SecureServingOptions) Validate() []error {
	if s == nil {
		return nil
	}