The process that happens when your API app calls the *external API* is named a "callback". Because the software that the external developer wrote sends a request to your API and then your API *calls back*, sending a request to an *external API* (that was probably created by the same developer).

import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Tests {@code Developer}.
 *
 */
class DeveloperTest {

    @Test
    void testHashCodeNullSafe() {
        new Developer().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Developer().equals(null));

        new Developer().equals(new Developer());
    }

    @Test
    void testEqualsIdentity() {

the bundle id before installing a new app. If the uninstalled app is the last app by
the developer identity, the device might also remove the permission to run apps from
that developer, and the exec wrapper will fail to install the new app. To avoid that,
install another app with the same developer identity but with a different bundle id.
That way, the permission to install apps is held on to while the primary app is

## Design

Then I spent some time designing the developer "API" I wanted to have as a user (as a developer using FastAPI).

I tested several ideas in the most popular Python editors: PyCharm, VS Code, Jedi based editors.

By the last <a href="https://www.jetbrains.com/research/python-developers-survey-2018/#development-tools" class="external-link" target="_blank">Python Developer Survey</a>, that covers about 80% of the users.

/// tip

To know more about each status code and which code is for what, check the <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Status" class="external-link" target="_blank"><abbr title="Mozilla Developer Network">MDN</abbr> documentation about HTTP status codes</a>.

///

## Shortcut to remember the names

Let's see the previous example again:

# ⚜ (✖️-🇨🇳 ℹ 🤝)

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">⚜ ⚖️ "✖️-🇨🇳 ℹ 🤝"</a> 🔗 ⚠ 🕐❔ 🕸 🏃‍♂ 🖥 ✔️ 🕸 📟 👈 🔗 ⏮️ 👩‍💻, &amp; 👩‍💻 🎏 "🇨🇳" 🌘 🕸.

## 🇨🇳

🇨🇳 🌀 🛠️ (`http`, `https`), 🆔 (`myapp.com`, `localhost`, `localhost.tiangolo.com`), &amp; ⛴ (`80`, `443`, `8080`).

, 🌐 👫 🎏 🇨🇳:

* `http://localhost`
* `https://localhost`
* `http://localhost:8080`

# CORS (Cross-Origin Resource Sharing)

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">Понятие CORS или "Cross-Origin Resource Sharing"</a> относится к ситуациям, при которых запущенный в браузере фронтенд содержит JavaScript-код, который взаимодействует с бэкендом, находящимся на другом "источнике" ("origin").

## Источник

    """
    Create an invoice.

    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

/// note | "Technical Details"

You could also use `from starlette.middleware.cors import CORSMiddleware`.

**FastAPI** provides several middlewares in `fastapi.middleware` just as a convenience for you, the developer. But most of the available middlewares come directly from Starlette.

        System.out.println();
        System.out.println(
                "Parent SCM developer connection is: " + project0.getScm().getDeveloperConnection());
        System.out.println(
                "Child SCM developer connection is: " + project1.getScm().getDeveloperConnection());

        assertEquals(project1.getScm().getUrl(), project0.getScm().getUrl() + "/modules/p1");