labels.top.search=Buscar
labels.index_title=Fess
labels.index_form_search_btn=Buscar
labels.index_osdd_title=Buscar
labels.index_form_option_btn=Opciones
labels.index_help=Ayuda
labels.search_options=Opciones de búsqueda
labels.search_options_close=Cerrar
labels.search_options_clear=Limpiar
labels.search_cache_msg=Esta es una caché de {0}. Es una instantánea de la página tal como apareció en {1}.

 * @since 10.0
 */
@DoNotMock("Use Optional.of(value) or Optional.absent()")
@GwtCompatible
public abstract class Optional<T> implements Serializable {
  /**
   * Returns an {@code Optional} instance with no contained reference.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this method is equivalent to Java 8's
   * {@code Optional.empty}.
   */
  public static <T> Optional<T> absent() {
    return Absent.withType();
  }

labels.design_configuration=Design da página
labels.design_title_file_upload=Arquivo para upload
labels.design_title_file=Gerenciador de arquivos
labels.design_file=Fazer upload de arquivo
labels.design_file_name=Nome do arquivo (opcional)
labels.design_button_upload=Fazer upload
labels.design_file_title_edit=Visualizar arquivo da página
labels.design_edit_button=Editar
labels.design_download_button=Baixar
labels.design_delete_button=Excluir

    List<Optional<Object>> optionals = ImmutableList.of(Optional.absent(), Optional.absent());
    assertThat(Optional.presentInstances(optionals)).isEmpty();
  }

  public void testPresentInstances_somePresent() {
    List<Optional<String>> optionals =
        ImmutableList.of(Optional.of("a"), Optional.<String>absent(), Optional.of("c"));

  }

  private static final Function<Object, Optional<?>> NULLABLE_TO_OPTIONAL =
      new Function<Object, Optional<?>>() {
        @Override
        public Optional<?> apply(@Nullable Object obj) {
          return Optional.fromNullable(obj);
        }
      };

  private static final Function<Optional<?>, @Nullable Object> OPTIONAL_TO_NULLABLE =
      new Function<Optional<?>, @Nullable Object>() {
        @Override

* `limit=10`: weil das der Defaultwert ist

## Optionale Parameter { #optional-parameters }

Auf die gleiche Weise können Sie optionale Query-Parameter deklarieren, indem Sie deren Defaultwert auf `None` setzen:

{* ../../docs_src/query_params/tutorial002_py310.py hl[7] *}

In diesem Fall wird der Funktionsparameter `q` optional und standardmäßig `None` sein.

/// check | Testen

```

////

#### `Union` oder `Optional` verwenden? { #using-union-or-optional }

Wenn Sie eine Python-Version unterhalb 3.10 verwenden, hier ist mein sehr **subjektiver** Standpunkt dazu:

* 🚨 Vermeiden Sie `Optional[SomeType]`
* Stattdessen ✨ **verwenden Sie `Union[SomeType, None]`** ✨.

   * Predicates.notNull())}, static importing as necessary.
   *
   * <p><b>Note:</b> if {@code first} is represented as an {@link Optional}, this can be
   * accomplished with {@link Optional#or(Object) first.or(second)}. That approach also allows for
   * lazy evaluation of the fallback instance, using {@link Optional#or(Supplier)
   * first.or(supplier)}.
   *
   * <p><b>Java 9 users:</b> use {@code java.util.Objects.requireNonNullElse(first, second)}

   * Predicates.notNull())}, static importing as necessary.
   *
   * <p><b>Note:</b> if {@code first} is represented as an {@link Optional}, this can be
   * accomplished with {@link Optional#or(Object) first.or(second)}. That approach also allows for
   * lazy evaluation of the fallback instance, using {@link Optional#or(Supplier)
   * first.or(supplier)}.
   *
   * <p><b>Java 9 users:</b> use {@code java.util.Objects.requireNonNullElse(first, second)}

    * **WebSockets**
    * extrem einfache Tests auf Basis von HTTPX und `pytest`
    * **CORS**
    * **Cookie-Sessions**
    * ... und mehr.

### Ihre App deployen (optional) { #deploy-your-app-optional }

Optional können Sie Ihre FastAPI-App in die <a href="https://fastapicloud.com" class="external-link" target="_blank">FastAPI Cloud</a> deployen, gehen Sie und treten Sie der Warteliste bei, falls noch nicht geschehen. 🚀