```

If you set an empty lookup bind password, the lookup bind will use the unauthenticated authentication mechanism, as described in [RFC 4513 Section 5.1.2](https://tools.ietf.org/html/rfc4513#section-5.1.2).

### User lookup

    private final Lookup lookup;

    private final LanguageRegistry languageRegistry;

    private final ConcurrentHashMap<String, Type> usedTypes;

    private final LegacyArtifactHandlerManager manager;

    @Inject
    public DefaultTypeRegistry(Lookup lookup, LanguageRegistry languageRegistry, LegacyArtifactHandlerManager manager) {
        this.lookup = requireNonNull(lookup, "lookup cannot be null");

    private final Logger logger = LoggerFactory.getLogger(getClass());

    private final Lookup lookup;

    private final DefaultLifecycles defaultLifeCycles;

    @Inject
    public DefaultLifecyclePluginAnalyzer(Lookup lookup, DefaultLifecycles defaultLifeCycles) {
        this.lookup = requireNonNull(lookup);
        this.defaultLifeCycles = requireNonNull(defaultLifeCycles);
    }

    private final Lookup lookup;

    private final TypeRegistry typeRegistry;

    @Inject
    public DefaultPackagingRegistry(Lookup lookup, TypeRegistry typeRegistry, List<PackagingProvider> providers) {
        super(providers);
        this.lookup = lookup;
        this.typeRegistry = typeRegistry;
    }

    @Override
    public Optional<Packaging> lookup(String id) {

 *
 * <p>Cache statistics are incremented according to the following rules:
 *
 * <ul>
 *   <li>When a cache lookup encounters an existing cache entry {@code hitCount} is incremented.
 *   <li>When a cache lookup first encounters a missing cache entry, a new entry is loaded.
 *       <ul>
 *         <li>After successfully loading an entry {@code missCount} and {@code loadSuccessCount}

 *
 * <p>Cache statistics are incremented according to the following rules:
 *
 * <ul>
 *   <li>When a cache lookup encounters an existing cache entry {@code hitCount} is incremented.
 *   <li>When a cache lookup first encounters a missing cache entry, a new entry is loaded.
 *       <ul>
 *         <li>After successfully loading an entry {@code missCount} and {@code loadSuccessCount}

    assertThat(cacheEvents()).containsExactly(CacheMiss::class)

    result = cachedDns.lookup("google.com")
    assertThat(server.takeRequest(1, TimeUnit.MILLISECONDS)).isNull()
    assertThat(result).isEqualTo(listOf(address("157.240.1.18")))

    assertThat(cacheEvents()).containsExactly(CacheHit::class)

    result = cachedDns.lookup("www.google.com")
    assertThat(result).containsExactly(address("157.240.1.18"))

            final Object bean = instantiateObject(implType);
            if (null == value) {
                processConfiguration(lookup, bean, loader, configuration, evaluator, listener);
            } else {
                // Use optimized helper for better performance
                new EnhancedCompositeBeanHelper(lookup, loader, evaluator, listener)
                        .setDefault(bean, value, configuration);
            }

    private final Lookup lookup;

    public PlexusContainerCapsule(
            LookupContext context, ClassLoader previousClassLoader, DefaultPlexusContainer plexusContainer) {
        this.previousClassLoader = requireNonNull(previousClassLoader, "previousClassLoader");
        this.plexusContainer = requireNonNull(plexusContainer, "plexusContainer");
        this.lookup = new DefaultLookup(plexusContainer);

   */
  @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()