public interface Lookup extends Service {
    /**
     * Performs a lookup for given typed component.
     *
     * @param type The component type.
     * @return The component.
     * @param <T> The component type.
     * @throws LookupException if no such component or there is some provisioning related issue.
     */
    @Nonnull
    <T> T lookup(Class<T> type);

    /**

@Singleton
@Deprecated(since = "4.0.0")
public class ToolchainManagerFactory {

    private final Lookup lookup;
    private final Logger logger;

    @Inject
    ToolchainManagerFactory(Lookup lookup) {
        this(lookup, null);
    }

    protected ToolchainManagerFactory(Lookup lookup, Logger logger) {
        this.lookup = lookup;
        this.logger = logger;
    }

    @Provides

import java.util.Optional;

import org.apache.maven.api.services.Lookup;
import org.apache.maven.api.services.LookupException;

public class SimpleLookup implements Lookup {
    private final List<Object> objects;

    public SimpleLookup(List<Object> objects) {
        this.objects = objects;
    }

    @Override
    public <T> T lookup(Class<T> type) {
        return objects.stream()

   */
  @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()

                .build();
    }

    static class WrapperLifecycleRegistry implements LifecycleRegistry {
        @Override
        @Nonnull
        public Optional<Lifecycle> lookup(String id) {
            return getDelegate().lookup(id);
        }

        @Override
        public Iterator<Lifecycle> iterator() {
            return getDelegate().iterator();
        }

    # Either the 'source' or 'remote' *must* be the "local" deployment
#    endpoint: "http://127.0.0.1:9000"
#    # path: "on|off|auto" # "on" enables path-style bucket lookup. "off" enables virtual host (DNS)-style bucket lookup. Defaults to "auto"
#    credentials:
#      accessKey: minioadmin # Required
#      secretKey: minioadmin # Required

        if (getContainer().hasComponent(ProjectBuilder.class, "test")) {
            projectBuilder = getContainer().lookup(ProjectBuilder.class, "test");
        } else {
            // default over to the main project builder...
            projectBuilder = getContainer().lookup(ProjectBuilder.class);
        }
    }

    protected ProjectBuilder getProjectBuilder() {
        return projectBuilder;
    }

     */
    NetbiosAddress[] getNodeStatus(NetbiosAddress nbtAddress) throws UnknownHostException;

    /**
     * Lookup addresses for the given <code>hostname</code>.
     *
     * @param hostname the hostname to resolve
     * @param possibleNTDomainOrWorkgroup if true, perform additional master browser lookup
     * @return found addresses
     * @throws UnknownHostException if the hostname cannot be resolved
     */

- CoreDNS (for DNS management based on populated bucket DNS service records, optional)

## Architecture

![bucket-lookup](https://github.com/minio/minio/blob/master/docs/federation/lookup/bucket-lookup.png?raw=true)

### Environment variables

#### MINIO_ETCD_ENDPOINTS

This is comma separated list of etcd servers that you want to use as the MinIO federation back-end. This should

 * fallbacks to guarantee that a fallback address is available.
 */
class DoubleInetAddressDns : Dns {
  override fun lookup(hostname: String): List<InetAddress> {
    val addresses = Dns.SYSTEM.lookup(hostname)
    return listOf(addresses[0], addresses[0])
  }