* Collections#emptyList}, and is preferable mainly for consistency and maintainability of your
   * code.
   *
   * <p><b>Performance note:</b> the instance returned is a singleton.
   */
  // Casting to any type is safe because the list will never hold any elements.
  @SuppressWarnings("unchecked")
  public static <E> ImmutableList<E> of() {
    return (ImmutableList<E>) EMPTY;

But we want to be able to parameterize that fixed content.

## A "callable" instance { #a-callable-instance }

In Python there's a way to make an instance of a class a "callable".

Not the class itself (which is already a callable), but an instance of that class.

To do that, we declare a method `__call__`:

{* ../../docs_src/dependencies/tutorial011_an_py310.py hl[12] *}

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.

    return CollectCollectors.toImmutableMultiset(elementFunction, countFunction);
  }

  /**
   * Returns the empty immutable multiset.
   *
   * <p><b>Performance note:</b> the instance returned is a singleton.
   */
  @SuppressWarnings("unchecked") // all supported methods are covariant
  public static <E> ImmutableMultiset<E> of() {
    return (ImmutableMultiset<E>) RegularImmutableMultiset.EMPTY;
  }

    instance := grid.NewStream[*Payload, *Req, *Resp](h, newPayload, newReq, newResp)

    // Tweakable options
    instance.WithPayload = true // default true when newPayload != nil
    instance.OutCapacity = 1    // default
    instance.InCapacity = 1     // default true when newReq != nil

    // Register the handler on the manager
    instance.Register(manager, handler, "asubroute")

        assertEquals(exp, transformer.getFileName(url, Constants.UTF_8));

        url = "http://example.com/" + encodeUrl("#") + "/@@folder/test.txt";
        exp = "test.txt";
        assertEquals(exp, transformer.getFileName(url, Constants.UTF_8));

        url = "http://example.com/test%20+%2B.txt";
        exp = "test  +.txt";
        assertEquals(exp, transformer.getFileName(url, Constants.UTF_8));

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.cling.transfer;

import java.time.Duration;
import java.time.Instant;

import org.apache.maven.api.MonotonicClock;
import org.eclipse.aether.transfer.AbstractTransferListener;
import org.eclipse.aether.transfer.TransferCancelledException;
import org.eclipse.aether.transfer.TransferEvent;

        originalSystemProperty = System.getProperty(Constants.MAVEN_LOGGER_DEFAULT_LOG_LEVEL);
        // Clear system property to test configuration file loading
        System.clearProperty(Constants.MAVEN_LOGGER_DEFAULT_LOG_LEVEL);
    }

    @AfterEach
    void tearDown() {
        // Restore original system property
        if (originalSystemProperty != null) {

@app.get("/callable-dependency-class")
async def get_callable_dependency_class(
    value: str, instance: CallableDependency = Depends()
):
    return instance(value)


@app.get("/callable-gen-dependency-class")
async def get_callable_gen_dependency_class(
    value: str, instance: CallableGenDependency = Depends()
):
    return next(instance(value))


@app.get("/async-callable-dependency-class")

    public static final String HC4_CLIENT = "hc4";

    /** Value for HC5 client selection. */
    public static final String HC5_CLIENT = "hc5";

    /** The HC4 HTTP client instance. */
    protected CrawlerClient hc4Client;

    /** The HC5 HTTP client instance. */
    protected CrawlerClient hc5Client;

    /** Flag indicating which client is selected (true = hc5, false = hc4). */
    private boolean useHc5 = true;

    /**