Si revisas la aplicación anterior, en la interfaz verás que, hasta ahora, permite al cliente decidir el `id` del `Hero` a crear. 😱

No deberíamos permitir que eso suceda, podrían sobrescribir un `id` que ya tenemos asignado en la base de datos. Decidir el `id` debería ser tarea del **backend** o la **base de datos**, **no del cliente**.

Podemos hacerlo mejor...

## Qué hace a una dependencia { #what-makes-a-dependency }

Hasta ahora has visto dependencias declaradas como funciones.

Pero esa no es la única forma de declarar dependencias (aunque probablemente sea la más común).

El factor clave es que una dependencia debe ser un "callable".

Mas se colocarmos isso na atribuição `response_model=PlaneItem | CarItem`, teríamos um erro, pois o Python tentaria executar uma **operação inválida** entre `PlaneItem` e `CarItem` em vez de interpretar isso como uma anotação de tipo.

## Lista de modelos { #list-of-models }

Da mesma forma, você pode declarar respostas de listas de objetos.

Para isso, use o padrão Python `list`:

{* ../../docs_src/extra_models/tutorial004_py310.py hl[18] *}

      return Iterators.find(unfiltered.iterator(), predicate);
    }

    @Override
    @ParametricNullness
    public E last() {
      SortedSet<E> sortedUnfiltered = (SortedSet<E>) unfiltered;
      while (true) {
        E element = sortedUnfiltered.last();
        if (predicate.apply(element)) {
          return element;
        }
        sortedUnfiltered = sortedUnfiltered.headSet(element);

				},
			},
		},

		// listMultipartResults - 31.
		// checking listing with marker set to 3.
		// `NextUploadIDMarker` is expected to be set on last uploadID in the result.
		// `NextKeyMarker` is expected to be set on the last object key in the list.
		{
			MaxUploads:         3,
			IsTruncated:        true,
			NextUploadIDMarker: uploadIDs[6],
			NextKeyMarker:      objectNames[2],

  private final char[][] replacements;
  // The number of elements in the replacement array.
  private final int replacementsLength;
  // The first character in the safe range.
  private final char safeMin;
  // The last character in the safe range.
  private final char safeMax;

  /**
   * Creates a new ArrayBasedCharEscaper instance with the given replacement map and specified safe

                lastName = e.filename;
                resumeKey = e.fileIndex;
            }

            bufferIndex += e.nextEntryOffset;
        }

        /* last nextEntryOffset for NT 4(but not 98) is 0 so we must
         * use dataCount or our accounting will report an error for NT :~(
         */

        //return bufferIndex - start;

        return dataCount;
    }

   * multimap, save that if all values associated with a key are removed and then the key is added
   * back into the multimap, that key will come last in the key iteration order.
   */
  public static MultimapBuilderWithKeys<@Nullable Object> linkedHashKeys() {
    return linkedHashKeys(DEFAULT_EXPECTED_KEYS);
  }

  /**

   * multimap, save that if all values associated with a key are removed and then the key is added
   * back into the multimap, that key will come last in the key iteration order.
   */
  public static MultimapBuilderWithKeys<@Nullable Object> linkedHashKeys() {
    return linkedHashKeys(DEFAULT_EXPECTED_KEYS);
  }

  /**

			XMLNS: "http://s3.amazonaws.com/doc/2006-03-01/",
		},
		bucketTargetConfig:     &madmin.BucketTargets{},
		bucketTargetConfigMeta: make(map[string]string),
	}
}

// Return the last update of this bucket metadata, which
// means, the last update of any policy document.
func (b BucketMetadata) lastUpdate() (t time.Time) {
	if b.PolicyConfigUpdatedAt.After(t) {
		t = b.PolicyConfigUpdatedAt
	}