System.out.println("MESSAGE: " + bytes.hex());
  }

  @Override public void onClosing(WebSocket webSocket, int code, String reason) {
    webSocket.close(1000, null);
    System.out.println("CLOSE: " + code + " " + reason);
  }

  @Override public void onFailure(WebSocket webSocket, Throwable t, Response response) {
    t.printStackTrace();
  }

  public static void main(String... args) {
    new WebSocketEcho().run();
  }

// TransferError will catch network errors during transfer.
// When TransferError() is called Close() will also
// be called, so we do not need to Wait() here.
func (w *writerAt) TransferError(err error) {
	_ = w.w.CloseWithError(err)
	_ = w.r.CloseWithError(err)
	w.err = err
}

func (w *writerAt) Close() (err error) {
	switch {
	case len(w.buffer) > 0:
		err = errors.New("some file segments were not flushed from the queue")

/**
 * <strong>Warning:</strong> This is an internal utility class that is only public for technical reasons, it is not part
 * of the public API. In particular, this class can be changed or deleted without prior notice.
 *
 * @deprecated since 4.0.0, use {@code maven-api-impl} jar instead
 */
@Deprecated(since = "4.0.0")
public class ArtifactDescriptorUtils {

    public static Artifact toPomArtifact(Artifact artifact) {

@AndroidIncompatible // custom classloading

@NullUnmarked
public class AbstractFutureCancellationCauseTest extends TestCase {

  private ClassLoader oldClassLoader;
  private URLClassLoader classReloader;
  private Class<?> settableFutureClass;
  private Class<?> abstractFutureClass;

  @Override
  protected void setUp() throws Exception {

import com.esotericsoftware.kryo.io.Output;

/**
 * A serializer class for handling object serialization and deserialization.
 * <p>
 * This class provides serialization capabilities using different serializers,
 * currently supporting Kryo and JavaBin serialization formats. The serializer
 * type is determined by the crawler data serializer configuration.
 * </p>
 * <p>
 * The class is thread-safe and uses ThreadLocal to maintain Kryo instances

 *
 */
public class AdminBoostdocAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminBoostdocAction() {
        super();
    }

    /** The role for this action. */
    public static final String ROLE = "admin-boostdoc";

    private static final Logger logger = LogManager.getLogger(AdminBoostdocAction.class);

 *
 */
public class AdminRoleAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminRoleAction() {
        super();
    }

    /** Role name for admin role operations */
    public static final String ROLE = "admin-role";

    private static final Logger logger = LogManager.getLogger(AdminRoleAction.class);

				if resCh != nil {
					resErr = nil
					select {
					case resCh <- results:
					case <-ctx.Done():
					}
					resCh = nil
					returned = true
				}
				continue
			}
			results.o = append(results.o, entry)
		}
		if resCh != nil {
			resErr = io.EOF
			select {
			case <-ctx.Done():
				// Nobody wants it.
			case resCh <- results:
			}
		}
	}()

import java.util.Map;

import javax.security.auth.kerberos.KerberosKey;

import jcifs.pac.PACDecodingException;

/**
 * Abstract base class for Kerberos authorization data.
 * This class provides parsing capabilities for different types of Kerberos authorization data.
 */
public abstract class KerberosAuthData {

    /**
     * Default constructor for KerberosAuthData.
     */
    protected KerberosAuthData() {

In this case, you can use `typing.Dict` (or just `dict` in Python 3.9 and above):

{* ../../docs_src/extra_models/tutorial005_py39.py hl[6] *}

## Recap { #recap }

Use multiple Pydantic models and inherit freely for each case.