## Modelos aninhados { #nested-models }

Cada atributo de um modelo Pydantic tem um tipo.

Mas esse tipo pode ser outro modelo Pydantic.

Portanto, você pode declarar "objects" JSON profundamente aninhados com nomes, tipos e validações de atributos específicos.

Tudo isso, aninhado arbitrariamente.

### Defina um sub-modelo { #define-a-submodel }

                // we dangerously assume E is a string
                List<E> extremeValues = (List<E>) getExtremeValues();
                @SuppressWarnings("unchecked")
                // map generators must past entry objects
                List<E> normalValues = (List<E>) asList(entries);

                // prepare extreme values to be filtered out of view
                sort(extremeValues, comparator);

 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.common.base.internal;

import static java.util.Objects.requireNonNull;

import java.lang.ref.PhantomReference;
import java.lang.ref.Reference;
import java.lang.ref.ReferenceQueue;
import java.lang.ref.WeakReference;
import java.lang.reflect.Constructor;

            return null;
        }

        List<SmbFile> files = new ArrayList<>();
        for (DirectoryCacheEntry.FileInfo fileInfo : entry.getChildren()) {
            try {
                // Create SmbFile objects from cached info
                SmbFile file = createSmbFileFromCache(directoryPath, fileInfo);
                files.add(file);
            } catch (Exception e) {

   * <p>Elements are copied from the argument collection as if by {@code collection.toArray()}.
   * Calling this method is as thread-safe as calling that method.
   *
   * @param collection a collection of {@code Character} objects
   * @return an array containing the same values as {@code collection}, in the same order, converted
   *     to primitives
   * @throws NullPointerException if {@code collection} or any of its elements is null
   */

     * @param actual the actual parameter type.
     * @return true if either formal type is assignable from actual type,
     *         or formal and actual are both primitive types and actual can be
     *         subject to widening conversion to formal.
     */
    private static boolean isStrictMethodInvocationConvertible(Class<?> formal, Class<?> actual) {
        // we shouldn't get a null into, but if so

        StandardBaseEncoding that = (StandardBaseEncoding) other;
        return this.alphabet.equals(that.alphabet)
            && Objects.equals(this.paddingChar, that.paddingChar);
      }
      return false;
    }

    @Override
    public int hashCode() {
      return alphabet.hashCode() ^ Objects.hashCode(paddingChar);
    }
  }

  private static final class Base16Encoding extends StandardBaseEncoding {

Crie um token de acesso JWT real e o retorne.

{* ../../docs_src/security/tutorial004_an_py310.py hl[121:136] *}

### Detalhes técnicos sobre o "sujeito" `sub` do JWT { #technical-details-about-the-jwt-subject-sub }

A especificação JWT diz que existe uma chave `sub`, com o sujeito do token.

É opcional usá-la, mas é onde você colocaria a identificação do usuário, então nós estamos usando aqui.

      Iterator<T> iterator = targetList.iterator();
      return peekingIterator(iterator);
    }

    @Override
    protected void verify(List<T> elements) {
      // verify same objects were removed from reference and target
      assertEquals(elements, targetList);
    }
  }

  private <T extends @Nullable Object> void actsLikeIteratorHelper(List<T> list) {

 * limitations under the License.
 */

package com.google.common.graph;

import static com.google.common.base.Preconditions.checkNotNull;
import static java.util.Objects.requireNonNull;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;
import com.google.errorprone.annotations.CanIgnoreReturnValue;