if l.Address == "" && l.Port == 0 && l.Type == "" {
		return true
	}
	if l.Address != "" {
		addresses := retrieveListenerAdditionalAddresses(listener)
		addresses = append(addresses, retrieveListenerAddress(listener))
		found := false
		for _, address := range addresses {
			if strings.EqualFold(address, l.Address) {
				found = true
			}
		}
		if !found {
			return false
		}
	}

    val result = proxies[nextProxyIndex++]
    resetNextInetSocketAddress(result)
    return result
  }

  /** Prepares the socket addresses to attempt for the current proxy or host. */
  @Throws(IOException::class)
  private fun resetNextInetSocketAddress(proxy: Proxy) {
    // Clear the addresses. Necessary if getAllByName() below throws!
    val mutableInetSocketAddresses = mutableListOf<InetSocketAddress>()

	"github.com/minio/minio/internal/logger"
	xnet "github.com/minio/pkg/v3/net"
)

var (
	// IPv4 addresses of localhost.
	localIP4 = mustGetLocalIP4()

	// IPv6 addresses of localhost.
	localIP6 = mustGetLocalIP6()

	// List of all local loopback addresses.
	localLoopbacks = mustGetLocalLoopbacks()
)

// mustSplitHostPort is a wrapper to net.SplitHostPort() where error is assumed to be a fatal.

They're also concrete: each URL identifies a specific path (like `/square/okhttp`) and query (like `?q=sharks&lang=en`). Each webserver hosts many URLs.

### [Addresses](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-address/)

Addresses specify a webserver (like `github.com`) and all of the **static** configuration necessary to connect to that server: the port number, HTTPS settings, and preferred network protocols (like HTTP/2).

        executor,
        null,
        object : DnsResolver.Callback<List<InetAddress>> {
          override fun onAnswer(
            addresses: List<InetAddress>,
            rCode: Int,
          ) {
            callback.onResponse(hostname, addresses)
          }

          override fun onError(e: DnsResolver.DnsException) {
            callback.onFailure(
              hostname,

// Endpoint represents a single logical "backend" implementing a service.
message Endpoint {
  // addresses of this endpoint. The contents of this field are interpreted
  // according to the corresponding EndpointSlice addressType field. Consumers
  // must handle different types of addresses in the context of their own
  // capabilities. This must contain at least one address but no more than

		// the 'for=' capture, which we ignore. In the case of multiple IP
		// addresses (for=8.8.8.8, 8.8.4.4, 172.16.1.20 is valid) we only
		// extract the first, which should be the client IP.
		if match := forRegex.FindStringSubmatch(fwd); len(match) > 1 {
			// IPv6 addresses in Forwarded headers are quoted-strings. We strip
			// these quotes.
			addr = strings.Trim(match[1], `"`)
		}
	}

  # outbound connections.
  # If "REDIRECT", use iptables REDIRECT to NAT and redirect to Envoy.
  # The "REDIRECT" mode loses source addresses during redirection.
  # If "TPROXY", use iptables TPROXY to redirect to Envoy.
  # The "TPROXY" mode preserves both the source and destination IP
  # addresses and ports, so that they can be used for advanced filtering
  # and manipulation.
  # The "TPROXY" mode also configures the sidecar to run with the

     * fallbacks to prevent the host machine's various IP addresses from interfering.
     */
    private val SINGLE_INET_ADDRESS_DNS =
      Dns { hostname ->
        val addresses = Dns.SYSTEM.lookup(hostname)
        listOf(addresses[0])
      }

    private operator fun Throwable?.plus(throwable: Throwable): Throwable {
      if (this != null) {

     * <li>indexed properties (java.util.List or array instance) should be contains <code>(\\w+)\\[(\\d+)\\]</code>
     * pattern, i.e. "user.addresses[1].street"</li>
     * <li>mapped properties should be contains <code>(\\w+)\\((.+)\\)</code> pattern,
     *  i.e. "user.addresses(myAddress).street"</li>
     * </ul>
     *
     * @param expression not null expression
     * @param root       not null object