@Override
    public UniAddress getByName ( String hostname, boolean possibleNTDomainOrWorkgroup ) throws UnknownHostException {
        return getAllByName(hostname, possibleNTDomainOrWorkgroup)[ 0 ];
    }


    @Override
    public UniAddress[] getAllByName ( String hostname, boolean possibleNTDomainOrWorkgroup ) throws UnknownHostException {
        if ( hostname == null || hostname.length() == 0 ) {

```kotlin
val client = OkHttpClient.Builder()
    .dns { hostname -> InetAddress.getAllByName(hostname).toList() }
    .build()
```

Kotlin calling OkHttp 4.x:

```kotlin
val client = OkHttpClient.Builder()
    .dns(object : Dns {
      override fun lookup(hostname: String) =
          InetAddress.getAllByName(hostname).toList()
    })
    .build()
```

SAM conversion impacts these APIs:

   * it to prefer IPv6.
   */
  private var dnsResults = listOf<InetAddress>()

  @BeforeEach
  internal fun setUp() {
    val inetAddresses = InetAddress.getAllByName("localhost")
    localhostIpv4 = inetAddresses.firstOrNull { it is Inet4Address }
      ?: throw TestAbortedException()
    localhostIpv6 = inetAddresses.firstOrNull { it is Inet6Address }
      ?: throw TestAbortedException()