public static <V extends @Nullable Object> ListenableFuture<V> immediateCancelledFuture() {
    ListenableFuture<Object> instance = ImmediateCancelledFuture.INSTANCE;
    if (instance != null) {
      return (ListenableFuture<V>) instance;
    }
    return new ImmediateCancelledFuture<>();
  }

  /**

Nous créons maintenant une dépendance qui renvoie un nouveau `config.Settings()`.

{* ../../docs_src/settings/app02_an_py310/main.py hl[6,12:13] *}

/// tip | Astuce

Nous parlerons de `@lru_cache` dans un instant.

Pour l'instant, vous pouvez supposer que `get_settings()` est une fonction normale.

///

Nous pouvons ensuite l'exiger depuis la fonction de chemin d'accès comme dépendance et l'utiliser où nous en avons besoin.

 * successive readings of "now" in the same process.
 *
 * <p>In contrast, <i>wall time</i> is a reading of "now" as given by a method like
 * {@link System#currentTimeMillis()}, best represented as an {@link java.time.Instant}. Such values
 * <i>can</i> be subtracted to obtain a {@link Duration} (such as by {@link Duration#between}), but
 * doing so does <i>not</i> give a reliable measurement of elapsed time, because wall time readings

    public Map<String, Object> getSource() {
        return SuggestItemSerializer.toSource(this);
    }

    /**
     * Parses a source map and returns a SuggestItem instance.
     * @param source The source map.
     * @return A SuggestItem instance.
     */
    public static SuggestItem parseSource(final Map<String, Object> source) {
        return SuggestItemSerializer.fromSource(source);
    }

    /**

    public static final String MAVEN_DEPLOY_BUILD_POM = "maven.deploy.buildPom";

    /**
     * User property used to store the build timestamp.
     *
     * @since 4.0.0
     */
    @Config(type = "java.time.Instant")
    public static final String MAVEN_START_INSTANT = "maven.startInstant";

    /**
     * Max number of problems for each severity level retained by the model builder.
     *
     * @since 4.0.0
     */

          <type>String</type>
        </field>
        <field>
          <name>properties</name>
          <version>3.0.0+</version>
          <description>Properties about the contributor, such as an instant messenger handle.</description>
          <type>Properties</type>
          <association xml.mapStyle="inline">
            <type>String</type>
            <multiplicity>*</multiplicity>
          </association>

    Module System.
 *  New: Log gzipped bodies when `HttpLoggingInterceptor` is used as a network
    interceptor.
 *  New: `Protocol.QUIC` constant. This protocol is not supported but this
    constant is included for completeness.
 *  New: Upgrade to Okio 1.14.0.

     ```xml
     <dependency>
       <groupId>com.squareup.okio</groupId>
       <artifactId>okio</artifactId>

Now `fastapi` doesn't include those standard dependencies unless you install with `pip install "fastapi[standard]"`.

Before, you would install `pip install fastapi`, now you should include the `standard` optional dependencies (unless you want to exclude one of those): `pip install "fastapi[standard]"`.

## Usando `TestClient` { #using-testclient }

/// info | Informação

Para usar o `TestClient`, primeiro instale [`httpx`](https://www.python-httpx.org).

Certifique-se de criar um [ambiente virtual](../virtual-environments.md), ativá-lo e instalá-lo, por exemplo:

```console
$ pip install httpx
```

///

Importe `TestClient`.

Crie um `TestClient` passando sua aplicação **FastAPI** para ele.

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>test</groupId>
    <artifactId>other</artifactId>
    <version>0.1-SNAPSHOT</version>

    <dependencyManagement>
        <dependencies>