if x.val.Kind() == constant.Unknown {
			// nothing to do (and don't cause an error below in the overflow check)
			return
		}
		var prec uint
		if isUnsigned(x.typ) {
			prec = uint(check.conf.sizeof(x.typ) * 8)
		}
		x.val = constant.UnaryOp(op2tok[op], x.val, prec)
		x.expr = e
		check.overflow(x, opPos(x.expr))
		return
	}

	x.mode = value
	// x.typ remains unchanged
}

    public static final File DEFAULT_USER_TOOLCHAINS_FILE = new File(USER_MAVEN_CONFIGURATION_HOME, "toolchains.xml");

    public static final File DEFAULT_GLOBAL_TOOLCHAINS_FILE =
            new File(System.getProperty("maven.conf"), "toolchains.xml");

    private static final String EXT_CLASS_PATH = "maven.ext.class.path";

    private static final String EXTENSIONS_FILENAME = "extensions.xml";

	sysctlExpireQuiescentTemplate = "net/ipv4/vs/expire_quiescent_template"
	sysctlForward                 = "net/ipv4/ip_forward"
	sysctlArpIgnore               = "net/ipv4/conf/all/arp_ignore"
	sysctlArpAnnounce             = "net/ipv4/conf/all/arp_announce"
)

// NewDualStackProxier returns a new Proxier for dual-stack operation
func NewDualStackProxier(
	ctx context.Context,
	ipt [2]utiliptables.Interface,

NODE_PORT_RANGE=${NODE_PORT_RANGE:-""}
API_BIND_ADDR=${API_BIND_ADDR:-"0.0.0.0"}
EXTERNAL_HOSTNAME=${EXTERNAL_HOSTNAME:-localhost}

KUBELET_HOST=${KUBELET_HOST:-"127.0.0.1"}
KUBELET_RESOLV_CONF=${KUBELET_RESOLV_CONF:-"/etc/resolv.conf"}
# By default only allow CORS for requests on localhost
API_CORS_ALLOWED_ORIGINS=${API_CORS_ALLOWED_ORIGINS:-/127.0.0.1(:[0-9]+)?$,/localhost(:[0-9]+)?$}
KUBELET_PORT=${KUBELET_PORT:-10250}

	DN_SILENT_INSTALL        = 0x20000000        // Silent install
	DN_NO_SHOW_IN_DM         = 0x40000000        // No show in device manager
	DN_BOOT_LOG_PROB         = 0x80000000        // Had a problem during preassignment of boot log conf
	DN_NEED_RESTART          = DN_LIAR           // System needs to be restarted for this Devnode to work properly
	DN_DRIVER_BLOCKED        = DN_NOT_FIRST_TIME // One or more drivers are blocked from loading for this Devnode

	// we switch into "large cluster mode" and optimize for iptables
	// performance over iptables debuggability
	largeClusterEndpointsThreshold = 1000
)

const sysctlRouteLocalnet = "net/ipv4/conf/all/route_localnet"
const sysctlNFConntrackTCPBeLiberal = "net/netfilter/nf_conntrack_tcp_be_liberal"

// NewDualStackProxier creates a MetaProxier instance, with IPv4 and IPv6 proxies.
func NewDualStackProxier(

  string cniConfDir = 7;

  // The name of the CNI plugin configuration file. Defaults to istio-cni.conf.
  string cniConfFileName = 8;

  // The directory path within the cluster node's filesystem where network namespaces are located.
  // Defaults to '/var/run/netns', in minikube/docker/others can be '/var/run/docker/netns'.

To use the new approach, simply replace any `upload<Conf>` configuration with a `publishing {}` block. See the <<publishing_setup.adoc#publishing_overview,publishing overview chapter>> for more information.

[[rel4.8:deferred_configuration]]