public void testUniqueIndexNullValue() {
    List<@Nullable String> listWithNull = Lists.newArrayList((String) null);
    assertThrows(
        NullPointerException.class,
        () -> Maps.uniqueIndex((List<String>) listWithNull, Functions.constant(1)));
  }

  /** Null keys aren't allowed either. */
  public void testUniqueIndexNullKey() {
    List<String> oneStringList = Lists.newArrayList("foo");
    assertThrows(

      return snapshot().toArray(array);
    }

    private List<Multiset.Entry<E>> snapshot() {
      List<Multiset.Entry<E>> list = newArrayListWithExpectedSize(size());
      // Not Iterables.addAll(list, this), because that'll forward right back here.
      Iterators.addAll(list, iterator());
      return list;
    }
  }

  /**
   * @serialData the ConcurrentMap of elements and their counts.

   *
   * Note that the list of proxies is never null, but it may be a list containing
   * only [Proxy.NO_PROXY]. This comes up in several situations:
   *
   * * If neither a proxy nor proxy selector is configured.
   * * If the proxy is configured explicitly as [Proxy.NO_PROXY].
   * * If the proxy selector returns only [Proxy.NO_PROXY].
   * * If the proxy selector returns an empty list or null.
   *

                        }
                    }
                    list.add(parseItem(isCombination, isDigit, version.substring(startIndex, i)));
                }
                startIndex = i + 1;

                if (!list.isEmpty()) {
                    list.add(list = new ListItem());
                    stack.push(list);
                }
                isCombination = false;

- Improved how the API server responds to **list** requests where the response format negotiates to Protobuf. List responses in Protobuf are marshalled one element at the time, drastically reducing memory needed to serve large collections. Streaming list responses can be disabled via the `StreamingCollectionEncodingToProtobuf` feature gate. ([#129407](https://github.com/kubernetes/kubernetes/pull/129407),...

    return a == b || (a != null && a.equals(b));
  }

  // Clone of Lists.newArrayList
  public static <E extends @Nullable Object> List<E> copyToList(Iterable<? extends E> elements) {
    List<E> list = new ArrayList<>();
    addAll(list, elements);
    return list;
  }

  public static <E extends @Nullable Object> List<E> copyToList(E[] elements) {
    return copyToList(asList(elements));
  }

  public void testBuilderAddAll() {
    List<String> a = asList("a", "b", "c");
    List<String> b = asList("c", "d", "e");
    ImmutableSet<String> set = this.<String>builder().addAll(a).addAll(b).build();
    assertThat(set).containsExactly("a", "b", "c", "d", "e").inOrder();
  }

  static final int LAST_COLOR_ADDED = 0x00BFFF;

  public void testComplexBuilder() {

	if partNumberMarker > 0 && start == -1 {
		// Marker not present among what is present on the
		// server, we return an empty list.
		return result, nil
	}

	if partNumberMarker > 0 && start != -1 {
		if start+1 >= len(partNums) {
			// Marker indicates that we are the end
			// of the list, so we simply return empty
			return result, nil
		}

		partNums = partNums[start+1:]
	}

  - *apiserver_storage_list_evaluated_objects_total*: Counter of objects tested in the course of serving a LIST request from etcd, broken down by resource
  - *apiserver_storage_list_returned_objects_total*: Counter of objects returned for a LIST request from etcd, broken down by resource ([#104983](https://github.com/kubernetes/kubernetes/pull/104983), [@MikeSpreitzer](https://github.com/MikeSpreitzer))

La sintaxis `{"name", "description"}` crea un `set` con esos dos valores.

Es equivalente a `set(["name", "description"])`.

///

#### Usar `list`s en lugar de `set`s { #using-lists-instead-of-sets }

Si olvidas usar un `set` y usas un `list` o `tuple` en su lugar, FastAPI todavía lo convertirá a un `set` y funcionará correctamente:

{* ../../docs_src/response_model/tutorial006_py310.py hl[29,35] *}