// constructor initializes.
func DomainNames(domainNames []string) EtcdOption {
	return func(args *CoreDNS) {
		args.domainNames = domainNames
	}
}

// DomainIPs set a list of custom domain IPs, note this will
// fail if set to empty when constructor initializes.
func DomainIPs(domainIPs set.StringSet) EtcdOption {
	return func(args *CoreDNS) {
		args.domainIPs = domainIPs
	}
}

  override fun dnsStart(
    call: Call,
    domainName: String,
  ) = onEvent(DnsStart(System.nanoTime(), call, domainName))

  override fun dnsEnd(
    call: Call,
    domainName: String,
    inetAddressList: List<InetAddress>,
  ) = onEvent(DnsEnd(System.nanoTime(), call, domainName, inetAddressList))

  override fun connectStart(
    call: Call,

    proxies: List<Proxy>,
  ) {
    logWithTime("proxySelectEnd: $proxies")
  }

  override fun dnsStart(
    call: Call,
    domainName: String,
  ) {
    logWithTime("dnsStart: $domainName")
  }

  override fun dnsEnd(
    call: Call,
    domainName: String,
    inetAddressList: List<InetAddress>,
  ) {
    logWithTime("dnsEnd: $inetAddressList")
  }

  override fun connectStart(

    proxies: List<Proxy>,
  ) {
    logWithTime("proxySelectEnd: $proxies")
  }

  override fun dnsStart(
    call: Call,
    domainName: String,
  ) {
    logWithTime("dnsStart: $domainName")
  }

  override fun dnsEnd(
    call: Call,
    domainName: String,
    inetAddressList: List<InetAddress>,
  ) {
    logWithTime("dnsEnd: $inetAddressList")
  }

  override fun connectStart(

        }

        ADDRESS_TYPE_DOMAIN_NAME -> {
          val domainNameLength: Int = fromSource.readByte() and 0xff
          val domainName = fromSource.readUtf8(domainNameLength.toLong())
          // Resolve HOSTNAME_THAT_ONLY_THE_PROXY_KNOWS to localhost.
          when {
            domainName.equals(HOSTNAME_THAT_ONLY_THE_PROXY_KNOWS, ignoreCase = true) -> {
              InetAddress.getByName("localhost")
            }

    override val call: Call,
    val domainName: String,
  ) : CallEvent()

  data class DnsEnd(
    override val timestampNs: Long,
    override val call: Call,
    val domainName: String,
    val inetAddressList: List<InetAddress>,
  ) : CallEvent() {
    override fun closes(event: CallEvent): Boolean = event is DnsStart && call == event.call && domainName == event.domainName
  }

  data class ConnectStart(

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package dns

import (
	"path"
	"strings"

	"github.com/miekg/dns"
)

// msgPath converts a domainname to an etcd path. If s looks like service.staging.skydns.local.,
// the resulting key will be /skydns/local/skydns/staging/service .
func msgPath(s, prefix string) string {
	l := dns.SplitDomainName(s)

      printEvent("proxySelectEnd");
    }

    @Override public void dnsStart(Call call, String domainName) {
      printEvent("dnsStart");
    }

    @Override public void dnsEnd(Call call, String domainName, List<InetAddress> inetAddressList) {
      printEvent("dnsEnd");
    }

    @Override public void connectStart(

    }

    @Override public void callStart(Call call) {
      printEvent("callStart");
    }

    @Override public void dnsStart(Call call, String domainName) {
      printEvent("dnsStart");
    }

    @Override public void dnsEnd(Call call, String domainName, List<InetAddress> inetAddressList) {
      printEvent("dnsEnd");
    }

    @Override public void connectStart(

  }

  @Override public void callEnd(Call call) {
    printEvent("callEnd");
  }

  @Override public void dnsStart(Call call, String domainName) {
    printEvent("dnsStart");
  }

  @Override public void dnsEnd(Call call, String domainName, List<InetAddress> inetAddressList) {
    printEvent("dnsEnd");
  }

  ...
}
```

We make a couple calls:

```java