*
   * <p>This method is similar to {@link java.util.concurrent.CompletableFuture#thenCompose} and
   * {@link java.util.concurrent.CompletableFuture#thenComposeAsync}. It can also serve some of the
   * use cases of {@link java.util.concurrent.CompletableFuture#handle} and {@link
   * java.util.concurrent.CompletableFuture#handleAsync} when used along with {@link #catching}.
   *

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import junit.framework.TestCase;

/**
 * Unit tests for {@link Closeables}.
 *
 * <p>Checks proper closing behavior, and ensures that IOExceptions on Closeable.close() are not
 * propagated out from the {@link Closeables#close} method if {@code swallowException} is true.
 *
 * @author Michael Lancaster
 */
public class CloseablesTest extends TestCase {

Fügen wir beispielsweise <a href="https://github.com/Rebilly/ReDoc/blob/master/docs/redoc-vendor-extensions.md#x-logo" class="external-link" target="_blank">ReDocs OpenAPI-Erweiterung</a> zum Einbinden eines benutzerdefinierten Logos hinzu.

### Normales **FastAPI**

Schreiben Sie zunächst wie gewohnt Ihre ganze **FastAPI**-Anwendung:

 * 'rootObject.getChild().getName()' for non-boolean properties, and
 * 'rootObject.getChild().isName()' for boolean properties.
 *
 * @deprecated use {@link org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public class ObjectBasedValueSource extends AbstractValueSource {

    private final Object root;

    /**

 * If the type is {@link org.apache.maven.api.Node Node} or
 * {@code List<}{@link org.apache.maven.api.Node Node}{@code >},
 * and {@code pathScope != ""}, the dependencies will be <i>flattened</i>.
 * Else the dependencies will be <i>resolved</i> and {@code pathScope} must be non empty,
 * and the field type can be {@link org.apache.maven.api.Node Node},
 * {@code List<}{@link org.apache.maven.api.Node Node}{@code >},

/**
 * {@link Channel}用のユーティリティです。
 *
 * @author koichik
 */
public abstract class ChannelUtil {

    /**
     * ファイルチャネルをメモリにマップした{@link ByteBuffer}を返します。
     *
     * @param channel
     *            ファイルチャネル。{@literal null}であってはいけません
     * @param mode
     *            モード。{@literal null}であってはいけません
     * @return ファイルチャネルをメモリにマップした{@link ByteBuffer}
     */

    assertFalse("add(nullPresent) should return false", getSet().add(null));
    expectContents(array);
  }

  /**
   * Returns the {@link Method} instance for {@link #testAdd_supportedNullPresent()} so that tests
   * can suppress it. See {@link CollectionAddTester#getAddNullSupportedMethod()} for details.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection

 * implementation for the {@link #get(Object)} and {@link #getIfPresent} methods. {@link
 * #getUnchecked}, {@link #get(Object, Callable)}, and {@link #getAll} are implemented in terms of
 * {@code get}; {@link #getAllPresent} is implemented in terms of {@code getIfPresent}; {@link
 * #putAll} is implemented in terms of {@link #put}, {@link #invalidateAll(Iterable)} is implemented

////

/// info

Щоб дізнатись більше про <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic, перегляньте його документацію</a>.

///

**FastAPI** повністю базується на Pydantic.

Ви побачите набагато більше цього всього на практиці в [Tutorial - User Guide](tutorial/index.md){.internal-link target=_blank}.

## Анотації типів у **FastAPI**

```Python
{!../../docs_src/python_types/tutorial010.py!}
```

/// info

想进一步了解 <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic，请阅读其文档</a>.

///

整个 **FastAPI** 建立在 Pydantic 的基础之上。

实际上你将在 [教程 - 用户指南](tutorial/index.md){.internal-link target=_blank} 看到很多这种情况。

## **FastAPI** 中的类型提示

**FastAPI** 利用这些类型提示来做下面几件事。

使用 **FastAPI** 时用类型提示声明参数可以获得：

* **编辑器支持**。