return newOption("xds_root_cert", value)
}

func Localhost(value LocalhostValue) Instance {
	return newOption("localhost", value)
}

func AdditionalLocalhost(value LocalhostValue) Instance {
	return newOption("additional_localhost", value)
}

func Wildcard(value WildcardValue) Instance {
	return newOption("wildcard", value)
}

func AdditionalWildCard(value WildcardValue) Instance {

          {
            "address": {
              "socket_address": {
                "protocol": "TCP",
                {{- if .metrics_localhost_access_only }}
                "address": "{{ .additional_localhost }}",
                {{ else }}
                "address": "{{ .additional_wildcard }}",
                {{ end }}
                "port_value": {{ .envoy_prometheus_port }}
              }
            }

					option.Localhost(option.LocalhostIPv6),
					option.AdditionalLocalhost(option.LocalhostIPv4),
					option.Wildcard(option.WildcardIPv6),
					option.AdditionalWildCard(option.WildcardIPv4),
					option.DNSLookupFamily(option.DNSLookupFamilyIPS))
			} else {
				opts = append(opts,
					option.Localhost(option.LocalhostIPv4),
					option.AdditionalLocalhost(option.LocalhostIPv6),
					option.Wildcard(option.WildcardIPv4),