@Override
    public void close() { /* cleanup */ }
}
```

2. **Register in DI config** (`crawler.xml`):
```xml
<component name="myClient" class="...MyClient" instance="singleton"/>
```

3. **Add to factory**:
```java
clientFactory.addClient("^myprotocol://.*", myClient);
```

4. **Add tests**: Unit + integration

### Adding a Content Extractor

     */
    public static <KEY, VALUE> Maps<KEY, VALUE> weakHashMap(final KEY key, final VALUE value) {
        return new Maps<>(new WeakHashMap<KEY, VALUE>()).$(key, value);
    }

    /**
     * Constructs an instance.
     *
     * @param map the <code>Map</code> to which keys and values are added
     */
    protected Maps(final Map<K, V> map) {
        this.map = map;
    }

    /**

        URLConnection connection = handler.openConnection(url);

        assertNotNull(connection, "Connection should not be null.");
        assertTrue(connection instanceof NtlmHttpURLConnection, "Connection should be an instance of NtlmHttpURLConnection.");
    }

    @Test
    void testOpenConnection_HttpsProtocol_ReturnsNtlmHttpURLConnection() throws Exception {

 *     classes can be chained onto them without casting.
 * @param <G> The type of the generator to be passed to testers in the generated test suite. An
 *     instance of G should somehow provide an instance of the class under test, plus any other
 *     information required to parameterize the test.
 * @author George van den Driessche
 */
@GwtIncompatible

    protected int filterCacheExpireAfterWrite = 10; // 10sec

    /**
     * The maximum number of items to load into the cache.
     */
    protected int maxLoadSize = 10000;

    /**
     * Creates a new instance of OpenSearchUrlFilterService.
     * @param crawlerConfig The crawler configuration.
     */
    public OpenSearchUrlFilterService(final OpenSearchCrawlerConfig crawlerConfig) {
        index = crawlerConfig.getFilterIndex();

   * depth-first dispatch order, vs. breadth-first when using a queue.
   */
  static Dispatcher immediate() {
    return ImmediateDispatcher.INSTANCE;
  }

  /** Dispatches the given {@code event} to the given {@code subscribers}. */
  abstract void dispatch(Object event, Iterator<Subscriber> subscribers);

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>test</groupId>
    <artifactId>test</artifactId>
    <version>0.1-SNAPSHOT</version>

    <dependencyManagement>
        <dependencies>

 * This form handles the initial setup and configuration
 * in the administrative wizard interface.
 */
public class IndexForm {

    /**
     * Default constructor for index form.
     * Creates a new instance with default values.
     */
    public IndexForm() {
        // Default constructor
    }

/**
 * Request body for creating boost document via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */
    public CreateBody() {
    }

 * Request body for creating kuromoji dictionary via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */
    public CreateBody() {
    }