public final Object mutex = new Object[0]; // something Serializable

  protected <K, V> Map<K, V> create() {
    TestMap<K, V> inner = new TestMap<>(new HashMap<K, V>(), mutex);
    Map<K, V> outer = Synchronized.map(inner, mutex);
    return outer;
  }

  static class TestMap<K, V> extends ForwardingMap<K, V> implements Serializable {
    public final Object mutex;
    private final Map<K, V> delegate;

        ClassPath.getClassPathEntry(new File("/home/build/outer.jar"), "file:/usr/test/dep.jar")
            .toURI());
    assertEquals(
        new File("/home/build/a.jar").toURI(),
        ClassPath.getClassPathEntry(new File("/home/build/outer.jar"), "a.jar").toURI());
    assertEquals(
        new File("/home/build/x/y/z").toURI(),
        ClassPath.getClassPathEntry(new File("/home/build/outer.jar"), "x/y/z").toURI());
    assertEquals(

# Guide de l'utilisateur avancé

## Caractéristiques supplémentaires

Le [Tutoriel - Guide de l'utilisateur](../tutorial/index.md){.internal-link target=_blank} devrait suffire à vous faire découvrir toutes les fonctionnalités principales de **FastAPI**.

Dans les sections suivantes, vous verrez des options, configurations et fonctionnalités supplémentaires.

/// note | Remarque

Les sections de ce chapitre ne sont **pas nécessairement "avancées"**.

{* ../../docs_src/openapi_callbacks/tutorial001.py hl[35] *}

/// tip | Dica

Perceba que você não está passando o roteador em si (`invoices_callback_router`) para `callback=`, mas o atributo `.routes`, como em `invoices_callback_router.routes`.

///

    // https://daniel.haxx.se/blog/2016/08/18/http2-connection-coalescing/

    // 1. This connection must be HTTP/2.
    if (http2Connection == null) return false

    // 2. The routes must share an IP address.
    if (routes == null || !routeMatchesAny(routes)) return false

    // 3. This connection's server certificates must cover the new host.
    if (address.hostnameVerifier !== OkHostnameVerifier) return false

public class SynchronizedDequeTest extends TestCase {

  protected Deque<String> create() {
    TestDeque<String> inner = new TestDeque<>();
    Deque<String> outer = Synchronized.deque(inner, inner.mutex);
    outer.add("foo"); // necessary because we try to remove elements later on
    return outer;
  }

  private static final class TestDeque<E> implements Deque<E> {
    private final Deque<E> delegate = new LinkedList<>();

* `summary`: Eine kurze Zusammenfassung der API.
* `description`: Die Beschreibung Ihrer API. Dies kann Markdown enthalten und wird in der Dokumentation angezeigt.
* `routes`: Eine Liste von Routen, dies sind alle registrierten *Pfadoperationen*. Sie stammen von `app.routes`.

/// info

Der Parameter `summary` ist in OpenAPI 3.1.0 und höher verfügbar und wird von FastAPI 0.99.0 und höher unterstützt.

///

* `summary`: Un breve resumen de la API.
* `description`: La descripción de tu API, esta puede incluir markdown y se mostrará en la documentación.
* `routes`: Una list de rutas, estas son cada una de las *path operations* registradas. Se toman de `app.routes`.

/// info | Información

El parámetro `summary` está disponible en OpenAPI 3.1.0 y versiones superiores, soportado por FastAPI 0.99.0 y superiores.

///

 *     a race in fast follow-up.
 *
 *  4. If there's no existing connection, make a list of routes (which may require blocking DNS
 *     lookups) and attempt new connections to them. When failures occur, retries iterate the
 *     list of available routes.
 *
 * If the pool gains an eligible connection while DNS, TCP, or TLS work is in flight, this finder

    public String createdTime;

    /** Search parameter: version number */
    public String versionNo;

    /**
     * Clears all pagination data and search parameters.
     * Resets counters, flags, and search form fields to their default values.
     */
    public void clear() {
        allRecordCount = 0;
        allPageCount = 0;
        existPrePage = false;
        existNextPage = false;