This will (let's imagine) let the API user (some external developer) create an
    invoice.

    And this path operation will:

    * Send the invoice to the client.
    * Collect the money from the client.
    * Send a notification back to the API user (the external developer), as a callback.
        * At this point is that the API will somehow send a POST request to the
            external API with the notification of the invoice event

* <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank"><strong>Swagger UI</strong></a>, с интерактивным исследованием, вызовом и тестированием вашего API прямо из браузера.

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Альтернативная документация API в <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank"><strong>ReDoc</strong></a>.

## 開発者とつながる

以下で、<a href="https://tiangolo.com" class="external-link" target="_blank">開発者 (Sebastián Ramírez / `tiangolo`)</a> とコンタクトをとれます:

* <a href="https://github.com/tiangolo" class="external-link" target="_blank">**GitHub** でフォロー</a>。
    * 他のオープンソースプロジェクトを確認できます。何かの助けになるものが見つかるかもしれません。
    * 新たなオープンソースプロジェクトを作成したときに通知されます。
* <a href="https://x.com/tiangolo" class="external-link" target="_blank">**X (Twitter)** でフォロー</a>。

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

/*
 * Source:
 * http://gee.cs.oswego.edu/cgi-bin/viewcvs.cgi/jsr166/src/jsr166e/extra/AtomicDoubleArray.java?revision=1.5
 * (Modified to adapt to guava coding conventions and
 * to use AtomicLongArray instead of sun.misc.Unsafe)
 */

* Caddy
    * Maneja automáticamente las renovaciones de certificados ✨
* Nginx
    * Con un componente externo como Certbot para las renovaciones de certificados
* HAProxy
    * Con un componente externo como Certbot para las renovaciones de certificados
* Kubernetes con un Controlador de Ingress como Nginx
    * Con un componente externo como cert-manager para las renovaciones de certificados

import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * This class provides a skeletal implementation of {@link Network}. It is recommended to extend
 * this class rather than implement {@link Network} directly.
 *
 * <p>The methods implemented in this class should not be overridden unless the subclass admits a
 * more efficient implementation.
 *

Откройте браузер по адресу: <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

Вы увидите JSON-ответ вида:

```JSON
{"message": "Hello World"}
```

### Интерактивная документация API { #interactive-api-docs }

Теперь перейдите по адресу: <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

* <a href="https://x.com/tiangolo" class="external-link" target="_blank">Me seguir no **X (Twitter)**</a> ou no <a href="https://fosstodon.org/@tiangolo" class="external-link" target="_blank">Mastodon</a>.
    * Me contar como você usa o FastAPI (adoro saber disso).
    * Ficar sabendo quando eu fizer anúncios ou lançar novas ferramentas.

### Confira { #check-it }

Abra o seu navegador em <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

Você verá essa resposta em JSON:

```JSON
{"message": "Hello World"}
```

### Documentação Interativa de APIs { #interactive-api-docs }

Agora vá para <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

### Compruébalo { #check-it }

Abre tu navegador en <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

Verás el response JSON como:

```JSON
{"message": "Hello World"}
```

### Documentación interactiva de la API { #interactive-api-docs }

Ahora ve a <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.