It is imported/included directly into FastAPI so that you can import it from `fastapi` and avoid accidentally importing the alternative `BackgroundTask` (without the `s` at the end) from `starlette.background`.

Ela é importada/incluída diretamente no FastAPI para que você possa importá-la do `fastapi` e evitar a importação acidental da alternativa `BackgroundTask` (sem o `s` no final) de `starlette.background`.

        ubiquity](https://github.com/google/guava/wiki/PhilosophyExplained#utility-times-ubiquity).


        #### Utility: compare with alternatives


        There is always *some* alternative to adding a new feature to Guava, even if it's just
        forking Guava yourself.


        We want to see that new features have some significant advantage over the alternatives.
        These advantages can take

Other HTTP libraries exist that fill that gap allowing extensive customisation including potentially
invalid requests.

Example Limitations

* Does not allow GET with a body.
* Cache is not an interface with alternative implementations.

Get a URL
---------

This program downloads a URL and prints its contents as a string. [Full source][get_example].

```java
OkHttpClient client = new OkHttpClient();

Probablemente puedas saltarte esta parte.

///

Hay una forma alternativa de definir esta lógica para ser ejecutada durante el *startup* y durante el *shutdown*.

     * below, we actually run the AbstractFutureTest methods under that scenario.
     */
    checkHelperVersion(NO_ATOMIC_REFERENCE_FIELD_UPDATER, "SynchronizedHelper");

    // Then, run the actual tests under each alternative classloader:

    /*
     * We don't need to test further under NO_UNSAFE: We verified that it selects
     * AtomicReferenceFieldUpdaterAtomicHelper, which is the default, which means that it's used

Par exemple, le générateur de projet <a href="https://github.com/tiangolo/full-stack-fastapi-postgresql" class="external-link" target="_blank">Full Stack FastAPI PostgreSQL</a>  peut être une meilleure alternative, étant activement maintenu et utilisé et comprenant toutes les nouvelles fonctionnalités et améliorations.

A maneira recomendada para lidar com a *inicialização* e o *encerramento* é usando o parâmetro `lifespan` da aplicação `FastAPI` como descrito acima.

Você provavelmente pode pular essa parte.

///

Existe uma forma alternativa para definir a execução dessa lógica durante *inicialização* e durante *encerramento*.

                        buf.append(bodyPart.getContent().toString()).append(' ');
                    } else if (bodyPart.isMimeType("multipart/alternative") && bodyPart.getContent() instanceof Multipart) {
                        final Multipart alternativePart = (Multipart) bodyPart.getContent();
                        for (int j = 0; j < alternativePart.getCount(); j++) {

    builder.setUnsafeReplacement("\uFFFD");

    /*
     * Except for \n, \t, and \r, all ASCII control characters are replaced with the Unicode
     * replacement character.
     *
     * Implementation note: An alternative to the following would be to make a map that simply
     * replaces the allowed ASCII whitespace characters with themselves and to set the minimum safe