//   and we could use that to make a decision about whether or not we timed out prior to being
  //   unparked.

  @SuppressWarnings({
    "LabelledBreakTarget", // TODO(b/345814817): Maybe fix?
    "nullness", // TODO(b/147136275): Remove once our checker understands & and |.
  })
  @ParametricNullness
  final V blockingGet(long timeout, TimeUnit unit)

            if (currentFile.getTimestamp().getTime() > dictFile.getTimestamp().getTime()) {
                throw new DictionaryException(dictFile.getPath() + " was updated.");
            }

            // TODO use stream
            try (CurlResponse response = ComponentUtil.getCurlHelper()
                    .post("/_configsync/file")
                    .param("path", dictFile.getPath())

               * case we ever switch to JUnit 4:
               */
              fail();
            }
          }
        });
  }

  // TODO(cpovirk): promote to Uninterruptibles, and add untimed version
  private static void joinUninterruptibly(Thread thread, long timeout, TimeUnit unit) {
    boolean interrupted = false;
    try {

            exceptions.forEach(exception::addSuppressed);
            throw exception;
        }
    }

    @Override
    protected MavenContext createContext(InvokerRequest invokerRequest) {
        // TODO: in a moment Maven stop pushing user properties to system properties (and maybe something more)
        // and allow multiple instances per JVM, this may become a pool? derive key based in invokerRequest?

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And there are several ways to get help too.

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            ArtifactVersion version2 = node2.getArtifact().getSelectedVersion();

            return version1.compareTo(version2) <= 0 ? node1 : node2;
        } catch (OverConstrainedVersionException exception) {
            // TODO log message or throw exception?

            return null;
        }
    }

    throw new UnsupportedOperationException();
  }

  private static final Joiner JOINER = Joiner.on(", ");

  @Override
  protected final void assertMoreInvariants(Map<K, V> map) {
    // TODO: can these be moved to MapInterfaceTest?
    for (Entry<K, V> entry : map.entrySet()) {
      assertEquals(entry.getKey() + "=" + entry.getValue(), entry.toString());
    }

        if (crawlingInfoPager.id != null) {
            cb.query().docMeta().setId_Equal(crawlingInfoPager.id);
        }
        // TODO Long, Integer, String supported only.
        if (StringUtil.isNotBlank(crawlingInfoPager.sessionId)) {
            cb.query().setSessionId_Match(crawlingInfoPager.sessionId);
        }

El ejemplo anterior muestra todas las partes que necesitas, pero aún no es muy útil, ya que podrías haber devuelto el `item` directamente, y **FastAPI** lo colocaría en un `JSONResponse` por ti, convirtiéndolo a un `dict`, etc. Todo eso por defecto.

Ahora, veamos cómo podrías usar eso para devolver un response personalizado.

Digamos que quieres devolver un response en <a href="https://en.wikipedia.org/wiki/XML" class="external-link" target="_blank">XML</a>.

 * @author Kevin Bourrillion
 * @author Louis Wasserman
 * @since 2.0
 */
@GwtCompatible
public abstract class ForwardingSet<E extends @Nullable Object> extends ForwardingCollection<E>
    implements Set<E> {
  // TODO(lowasser): identify places where thread safety is actually lost

  /** Constructor for use by subclasses. */
  protected ForwardingSet() {}

  @Override
  protected abstract Set<E> delegate();

  @Override