void getAllByNameRejectsNullOrEmptyHostname() {
        assertThrows(UnknownHostException.class, () -> UniAddress.getAllByName("", false),
                "getAllByName should throw UnknownHostException for empty string");
        assertThrows(UnknownHostException.class, () -> UniAddress.getAllByName(null, false),
                "getAllByName should throw UnknownHostException for null name");
    }

   */
  @Throws(UnknownHostException::class)
  fun lookup(hostname: String): List<InetAddress>

  companion object {
    /**
     * A DNS that uses [InetAddress.getAllByName] to ask the underlying operating system to
     * lookup IP addresses. Most custom [Dns] implementations should delegate to this instance.
     */
    @JvmField
    val SYSTEM: Dns = DnsSystem()

     * @throws UnknownHostException if the host name cannot be resolved
     */
    @Override
    public InetAddress[] resolve(final String host) throws UnknownHostException {
        return InetAddress.getAllByName(toAscii(host));
    }

    /**
     * Decodes the given host string using the specified encoding.
     *
     * @param host the host string to decode
     * @return the decoded host string
     */

     * @param possibleNTDomainOrWorkgroup if true, perform additional master browser lookup
     * @return found addresses
     * @throws UnknownHostException if the hostname cannot be resolved
     */
    Address[] getAllByName(String hostname, boolean possibleNTDomainOrWorkgroup) throws UnknownHostException;

    /**
     * Lookup <code>hostname</code> and return it's <code>UniAddress</code>. If the

  }

  /** 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>()
    inetSocketAddresses = mutableInetSocketAddresses

    val socketHost: String
    val socketPort: Int