/**
 * Unit tests for the {@link ModelVersionUtils} utility class.
 * Tests model version detection, validation, upgrade logic, and namespace operations.
 */
@DisplayName("ModelVersionUtils")
class ModelVersionUtilsTest {

    @Nested
    @DisplayName("Model Version Detection")
    class ModelVersionDetectionTests {

        @Test

import org.codehaus.plexus.util.xml.pull.XmlSerializer;

/**
 * Class CoreExtensionsXpp3Writer.
 *
 * @deprecated use {@code org.apache.maven.cling.internal.extension.io.CoreExtensionsStaxWriter}
 */
@Deprecated
@SuppressWarnings("all")
public class CoreExtensionsXpp3Writer {

    // --------------------------/
    // - Class/Member Variables -/
    // --------------------------/

    /**

{* ../../docs_src/middleware/tutorial001_py39.py hl[8:9,11,14] *}

/// tip

Keep in mind that custom proprietary headers can be added <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">using the `X-` prefix</a>.

But you are not restricted to using some specific data model, class or type.

Do you want to have an `id` and `email` and not have any `username` in your model? Sure. You can use these same tools.

Do you want to just have a `str`? Or just a `dict`? Or a database class model instance directly? It all works the same way.

import static org.mockito.Mockito.when;

class ExclusionArtifactFilterTest {
    private Artifact artifact;
    private Artifact artifact2;

    @BeforeEach
    void setup() {
        artifact = mock(Artifact.class);
        when(artifact.getGroupId()).thenReturn("org.apache.maven");
        when(artifact.getArtifactId()).thenReturn("maven-core");

        artifact2 = mock(Artifact.class);

* <a href="https://www.uvicorn.dev/" class="external-link" target="_blank">Uvicorn</a>：高性能 ASGI 服务器。
* <a href="https://hypercorn.readthedocs.io/" class="external-link" target="_blank">Hypercorn</a>：与 HTTP/2 和 Trio 等兼容的 ASGI 服务器。
* <a href="https://github.com/django/daphne" class="external-link" target="_blank">Daphne</a>：为 Django Channels 构建的 ASGI 服务器。

import org.codehaus.plexus.util.xml.pull.XmlPullParserException;

/**
 * Class CoreExtensionsXpp3Reader.
 *
 * @deprecated use {@code org.apache.maven.cling.internal.extension.io.CoreExtensionsStaxReader}
 */
@Deprecated
@SuppressWarnings("all")
public class CoreExtensionsXpp3Reader {

    // --------------------------/
    // - Class/Member Variables -/
    // --------------------------/

    /**

 *
 * from igor: two plugins A and B, both depend on the same library but use different versions, say
 * lib 1.0 and lib 2.0 when debugger hits a breakpoint inside a class from the library, IDE needs to
 * know which version of library the class comes from
 */

You import it and create an "instance" the same way you would with the class `FastAPI`:

{* ../../docs_src/bigger_applications/app_an_py39/routers/users.py hl[1,3] title["app/routers/users.py"] *}

### *Path operations* with `APIRouter` { #path-operations-with-apirouter }

And then you use it to declare your *path operations*.

Use it the same way you would use the `FastAPI` class:

## Instalar `PyJWT` { #install-pyjwt }

Nós precisamos instalar o `PyJWT` para criar e verificar os tokens JWT em Python.

Certifique-se de criar um [ambiente virtual](../../virtual-environments.md){.internal-link target=_blank}, ativá-lo e então instalar o `pyjwt`:

<div class="termy">

```console
$ pip install pyjwt