*
   * @since 21.0
   */
  default void forEach(BiConsumer<? super K, ? super V> action) {
    checkNotNull(action);
    entries().forEach(entry -> action.accept(entry.getKey(), entry.getValue()));
  }

  /**
   * Returns a view of this multimap as a {@code Map} from each distinct key to the nonempty

        }
      };
    }

    @Override
    public boolean contains(@Nullable Object object) {
      if (object instanceof Entry) {
        Entry<?, ?> entry = (Entry<?, ?>) object;
        Object k = entry.getKey();
        Object v = entry.getValue();
        return v != null && v.equals(map.get(k));
      }
      return false;
    }

    @Override
    boolean isPartialView() {
      return true;
    }

Ich denke, `Union[SomeType, None]` ist expliziter bezüglich seiner Bedeutung.

Es geht nur um Wörter und Namen. Aber diese Worte können beeinflussen, wie Sie und Ihre Teamkollegen über den Code denken.

Nehmen wir zum Beispiel diese Funktion:

{* ../../docs_src/python_types/tutorial009c.py hl[1,4] *}

        // N.B. There will only be an entry in the map if the service has started
        for (Entry<Service, Stopwatch> entry : startupTimers.entrySet()) {
          Service service = entry.getKey();
          Stopwatch stopwatch = entry.getValue();
          if (!stopwatch.isRunning() && !(service instanceof NoOpService)) {
            loadTimes.add(Maps.immutableEntry(service, stopwatch.elapsed(MILLISECONDS)));

                    continue;
                }
                counter++;
                final Map<String, Object> localDataMap =
                        dataMap.entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
                if (deleteUrlList.contains(crawlRequest.getUrl())) {
                    deleteDocuments(); // delete before indexing
                }
                try {

      builder.putAll(map);
      for (Entry<TypeVariableKey, ? extends Type> mapping : mappings.entrySet()) {
        TypeVariableKey variable = mapping.getKey();
        Type type = mapping.getValue();
        checkArgument(!variable.equalsType(type), "Type variable %s bound to itself", variable);
        builder.put(variable, type);
      }

    ImmutableListMultimap.Builder<String, String> builder = ImmutableListMultimap.builder();
    for (Entry<String, String> entry : parameters.entries()) {
      String key = entry.getKey();
      if (!normalizedAttribute.equals(key)) {
        builder.put(key, entry.getValue());
      }
    }
    for (String value : values) {

		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidSSECustomerAlgorithm), r.URL)
		return
	}

	var oldKey, newKey []byte
	var newKeyID string
	var kmsCtx kms.Context
	var objEncKey crypto.ObjectKey
	sseCopyKMS := crypto.S3KMS.IsEncrypted(srcInfo.UserDefined)
	sseCopyS3 := crypto.S3.IsEncrypted(srcInfo.UserDefined)

                    if (fields != null) {
                        docMap.putAll(fields.entrySet()
                                .stream()
                                .collect(Collectors.toMap(Entry::getKey, e -> (Object) e.getValue().getValues())));
                    }

                    final ViewHelper viewHelper = ComponentUtil.getViewHelper();
                    if (viewHelper != null && !docMap.isEmpty()) {

          }
        };
    for (Entry<Class<?>, Collection<Object>> entry : distinctValues.asMap().entrySet()) {
      generator.addSampleInstances((Class) entry.getKey(), entry.getValue());
    }
    return generator;
  }

  private static @Nullable Object generateDummyArg(Parameter param, FreshValueGenerator generator)
      throws ParameterNotInstantiableException {