*
 * @author Cliff Biffle
 * @since 10.0
 */
@ElementTypesAreNonnullByDefault
public class DeadEvent {

  private final Object source;
  private final Object event;

  /**
   * Creates a new DeadEvent.
   *
   * @param source object broadcasting the DeadEvent (generally the {@link EventBus}).
   * @param event the event that could not be delivered.
   */
  public DeadEvent(Object source, Object event) {

 */
@Deprecated(since = "4.0.0")
public class ToolchainsBuildingException extends Exception {

    private final List<Problem> problems;

    /**
     * Creates a new exception with the specified problems.
     *
     * @param problems The problems that cause this exception, must not be {@code null}.
     */
    public ToolchainsBuildingException(List<Problem> problems) {

        "type": "keyword"
      },
      "url": {
        "type": "keyword"
      },
      "docId": {
        "type": "keyword"
      },
      "queryId": {
        "type": "keyword"
      },
      "createdAt": {
        "type": "date",
        "format": "date_optional_time"
      }
    }

    RequestBody requestBody = new MultipartBody.Builder()
        .setType(MultipartBody.FORM)
        .addFormDataPart("title", "Square Logo")
        .addFormDataPart("image", "logo-square.png",
            RequestBody.create(
                new File("docs/images/logo-square.png"),
                MEDIA_TYPE_PNG))
        .build();

    Request request = new Request.Builder()
        .header("Authorization", "Client-ID " + IMGUR_CLIENT_ID)

 *
 * @since 4.0.0
 */
@Experimental
public interface ForkedMavenParser extends MavenParser<ForkedMavenInvokerRequest> {
    /**
     * Parses the given ParserRequest to create a ForkedMavenInvokerRequest.
     * This method is responsible for interpreting the contents of the ParserRequest
     * and constructing the appropriate ForkedMavenInvokerRequest object for forked Maven operations.
     *

/**
 * Defines the contract for parsing encryption-related command-line arguments and creating an EncryptInvokerRequest.
 * This interface extends the general {@link Parser} interface, specializing it for encryption operations.
 *
 * @since 4.0.0
 */
@Experimental
public interface EncryptParser extends Parser<EncryptInvokerRequest> {
    /**
     * Parses the given ParserRequest to create an EncryptInvokerRequest.

    public int selectCount(CBCall<WebAuthenticationCB> cbLambda) {
        return facadeSelectCount(createCB(cbLambda));
    }

    public OptionalEntity<WebAuthentication> selectEntity(CBCall<WebAuthenticationCB> cbLambda) {
        return facadeSelectEntity(createCB(cbLambda));
    }

    protected OptionalEntity<WebAuthentication> facadeSelectEntity(WebAuthenticationCB cb) {

      }
    }
  }

  /** Resets the contents of navigableSet to have elements a, c, for the navigation tests. */
  protected void resetWithHole() {
    super.resetContainer(getSubjectGenerator().create(a, c));
    navigableSet = (NavigableSet<E>) getSet();
  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)
  public void testEmptySetPollFirst() {

   * internal, unbounded pool at the first call to {@code addListener} and holding it until the
   * future is {@linkplain Future#isDone() done}.
   *
   * <p>Prefer to create {@code ListenableFuture} instances with {@link SettableFuture}, {@link
   * MoreExecutors#listeningDecorator( java.util.concurrent.ExecutorService)}, {@link

    * `description`: a `str` with a short description for the external docs.
    * `url` (**required**): a `str` with the URL for the external documentation.

### Create metadata for tags

Let's try that in an example with tags for `users` and `items`.

Create metadata for your tags and pass it to the `openapi_tags` parameter:

```Python hl_lines="3-16  18"
{!../../docs_src/metadata/tutorial004.py!}
```