1. Nous continuons à importer `field` depuis les `dataclasses` standard.

2. `pydantic.dataclasses` est un remplacement drop‑in pour `dataclasses`.

3. La dataclass `Author` inclut une liste de dataclasses `Item`.

4. La dataclass `Author` est utilisée comme paramètre `response_model`.

5. Vous pouvez utiliser d'autres annotations de type standard avec des dataclasses comme corps de la requête.

 * </ul>
 *
 * <p>An exception that is suppressed is added to the exception that <i>will</i> be thrown using
 * {@code Throwable.addSuppressed(Throwable)}.
 *
 * @author Colin Decker
 * @since 14.0
 */
// Coffee's for {@link Closer closers} only.
@J2ktIncompatible
@GwtIncompatible
public final class Closer implements Closeable {
  /** Creates a new {@link Closer}. */

import java.nio.ByteOrder;
import org.jspecify.annotations.Nullable;

/**
 * See MurmurHash3_x64_128 in <a href="http://smhasher.googlecode.com/svn/trunk/MurmurHash3.cpp">the
 * C++ implementation</a>.
 *
 * @author Austin Appleby
 * @author Dimitris Andreou
 */
@Immutable
@SuppressWarnings("IdentifierName") // the best we could do for adjacent digit blocks
final class Murmur3_128HashFunction extends AbstractHashFunction implements Serializable {

 * Static utility methods pertaining to instances of {@link Throwable}.
 *
 * <p>See the Guava User Guide entry on <a
 * href="https://github.com/google/guava/wiki/ThrowablesExplained">Throwables</a>.
 *
 * @author Kevin Bourrillion
 * @author Ben Yu
 * @since 1.0
 */
@GwtCompatible
public final class Throwables {
  private Throwables() {}

  /**
   * Throws {@code throwable} if it is an instance of {@code declaredType}. Example usage:

 *
 * @param <E> the type of element returned by the iterator
 * @param <I> the type of the iterator ({@link Iterator} or {@link ListIterator})
 * @author Kevin Bourrillion
 * @author Chris Povirk
 */
@GwtCompatible
@NullMarked
abstract class AbstractIteratorTester<E extends @Nullable Object, I extends Iterator<E>> {
  private final Stimulus<E, ? super I>[] stimuli;

	switch op {
	case opLt:
		return left.Before(right)
	case opLte:
		return left.Before(right) || left.Equal(right)
	case opGt:
		return left.After(right)
	case opGte:
		return left.After(right) || left.Equal(right)
	case opEq:
		return left.Equal(right)
	case opIneq:
		return !left.Equal(right)
	}
	// This case does not happen
	return false

import com.google.common.base.Preconditions;
import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@link ImmutableSet} with exactly one element.
 *
 * @author Kevin Bourrillion
 * @author Nick Kralevich
 */
@GwtCompatible
@SuppressWarnings("serial") // uses writeReplace(), not default serialization
final class SingletonImmutableSet<E> extends ImmutableSet<E> {

import java.util.Map;
import java.util.Map.Entry;
import org.jspecify.annotations.NullMarked;

/**
 * Generators of various {@link com.google.common.collect.BiMap}s and derived collections.
 *
 * @author Jared Levy
 * @author Hayward Chan
 */
@GwtCompatible
@NullMarked
public class BiMapGenerators {
  public static class ImmutableBiMapGenerator extends TestStringBiMapGenerator {
    @Override

<!--
  ~ Copyright 2009 the original author or authors.
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~      http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,

import com.google.common.escape.CharEscaper;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Tests for the {@link XmlEscapers} class.
 *
 * @author Alex Matevossian
 * @author David Beaumont
 */
@GwtCompatible
@NullUnmarked
public class XmlEscapersTest extends TestCase {

  public void testXmlContentEscaper() throws Exception {