for _, ip := range addresses {
		ips = append(ips, ip)
	}

	return ips, nil
}

// ContainsIPv4Loopback returns true if npa's CIDRs contain an IPv4 loopback address.
func (npa *NodePortAddresses) ContainsIPv4Loopback() bool {
	return npa.containsIPv4Loopback

			if got := npa.ContainsIPv4Loopback(); got != tt.want {
				t.Errorf("IPv4 ContainsIPv4Loopback() = %v, want %v", got, tt.want)
			}
			// ContainsIPv4Loopback should always be false for family=IPv6
			npa = NewNodePortAddresses(v1.IPv6Protocol, tt.cidrStrings)
			if got := npa.ContainsIPv4Loopback(); got {
				t.Errorf("IPv6 ContainsIPv4Loopback() = %v, want %v", got, false)
			}
		})
	}

) (*Proxier, error) {
	logger := klog.LoggerWithValues(klog.FromContext(ctx), "ipFamily", ipFamily)
	nodePortAddresses := proxyutil.NewNodePortAddresses(ipFamily, nodePortAddressStrings)

	if !nodePortAddresses.ContainsIPv4Loopback() {
		localhostNodePorts = false
	}
	if localhostNodePorts {
		// Set the route_localnet sysctl we need for exposing NodePorts on loopback addresses
		// Refer to https://issues.k8s.io/90259