// We use a "custom" equivalence to force MapMaker to make a MapMakerInternalMap.
        ConcurrentMap<K, V> newMap = new MapMaker().keyEquivalence(Equivalence.equals()).makeMap();
        checkState(newMap instanceof MapMakerInternalMap);
        newMap.putAll(map);
        return newMap;
      }
    },
    MapMakerStrongKeysWeakValues {
      @Override

    /**
     * {@return the project packaging}.
     * <p>
     * Note: unlike in legacy code, logical checks against string representing packaging (returned by this method)
     * are NOT recommended (code like {@code "pom".equals(project.getPackaging)} must be avoided). Use method
     * {@link #getArtifacts()} to gain access to POM or build artifact.
     *
     * @see #getArtifacts()
     */
    @Nonnull
    Packaging getPackaging();

Você também pode usar modelos Pydantic como subtipos de `list`, `set`, etc:

{* ../../docs_src/body_nested_models/tutorial006.py hl[20] *}

Isso vai esperar(converter, validar, documentar, etc) um corpo JSON tal qual:

```JSON hl_lines="11"
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2,
    "tags": [
        "rock",
        "metal",
        "bar"
    ],

        }

        @Override
        public boolean matches(HttpServletRequest request) {
            if (request == null) {
                return false;
            }
            return path.equals(request.getRequestURI());
        }

        @Override
        public void process(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
                throws IOException, ServletException {

            AvPair decoded = decodedPairs.get(i);

            assertEquals(original.getType(), decoded.getType(), "Type should match at index " + i);
            assertTrue(Arrays.equals(original.getRaw(), decoded.getRaw()), "Raw data should match at index " + i);
        }
    }

    /**
     * Test decode with AvSingleHost type
     */
    @Test

  private static void assertByteArrayEquals(byte[] expected, byte[] actual) {
    assertWithMessage(
            "Expected: " + Arrays.toString(expected) + ", but got: " + Arrays.toString(actual))
        .that(Arrays.equals(expected, actual))
        .isTrue();
  }

  public void testToByteArray() {
    assertByteArrayEquals(
        new byte[] {0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19},

            final String sessionId;
            if (searchLog.getUserSessionId() != null) {
                sessionId = searchLog.getUserSessionId();
            } else if (Constants.SEARCH_LOG_ACCESS_TYPE_WEB.equals(searchLog.getAccessType())) {
                sessionId = searchLog.getClientIp();
            } else {
                sessionId = searchLog.getClientIp() + '_' + searchLog.getSearchWord();
            }

        Set<String> edges = network.edgesConnecting(node, adjacentNode);
        Set<String> antiParallelEdges = network.edgesConnecting(adjacentNode, node);
        assertThat(node.equals(adjacentNode) || Collections.disjoint(edges, antiParallelEdges))
            .isTrue();
      }
    }
  }

  @Override
  @Test
  public void nodes_checkReturnedSetMutability() {

            }
          };
        }
      };
    }
  }

  ImmutableCollection<V> createValues() {
    return new ImmutableMapValues<K, V>(this);
  }

  @Override
  public boolean equals(@Nullable Object object) {
    return Maps.equalsImpl(this, object);
  }

  @Override
  public int hashCode() {
    // not caching hash code since it could change if map values are mutable

        Set<String> edges = network.edgesConnecting(node, adjacentNode);
        Set<String> antiParallelEdges = network.edgesConnecting(adjacentNode, node);
        assertThat(node.equals(adjacentNode) || Collections.disjoint(edges, antiParallelEdges))
            .isTrue();
      }
    }
  }

  @Override
  @Test
  public void nodes_checkReturnedSetMutability() {