/**
 * 引数がnullだった場合にthrowする例外です。
 *
 * {@link NullPointerException}をthrowする代わりに使うことを想定しています。
 *
 * @author wyukawa
 */
public class NullArgumentException extends ClIllegalArgumentException {

    /**
     *
     */
    private static final long serialVersionUID = 1L;

    /**
     * {@link NullArgumentException}を作成します。
     *
     * @param argName

/**
 * The Exception class throw by the {@link ProjectBuilder} service.
 *
 * @since 4.0.0
 */
@Experimental
public class ProjectBuilderException extends MavenException {

    @Serial
    private static final long serialVersionUID = -7629871850875943799L;

    /**
     * @param message the message to give
     * @param e the {@link Exception}
     */

/**
 * The Exception class throw by the {@link Prompter} service.
 *
 * @since 4.0.0
 */
@Experimental
public class PrompterException extends MavenException {

    @Serial
    private static final long serialVersionUID = -3505070928479515081L;

    /**
     * @param message the message to give
     * @param e the {@link Exception}
     */

/**
 * The Exception class throw by the {@link ToolchainManager}.
 *
 * @since 4.0.0
 */
@Experimental
public class ToolchainManagerException extends MavenException {

    @Serial
    private static final long serialVersionUID = -9465854226608498L;

    /**
     * @param message the message to give
     * @param e the {@link Exception}
     */

import java.net.URI;

/**
 * Configuration for generating Javadocs
 */
public abstract class Javadocs {
    /**
     * Link to Java API to use when generating Javadoc
     */
    public abstract Property<URI> getJavaApi();

    /**
     * Link to Groovy API to use when generating Javadoc
     */
    public abstract Property<URI> getGroovyApi();

    /**
     * The CSS file to style Javadocs with

但 FastAPI 还可以使用数据类（<a href="https://docs.python.org/3/library/dataclasses.html" class="external-link" target="_blank">`dataclasses`</a>）：

```Python hl_lines="1  7-12  19-20"
{!../../docs_src/dataclasses/tutorial001.py!}
```

这还是借助于 **Pydantic** 及其<a href="https://pydantic-docs.helpmanual.io/usage/dataclasses/#use-of-stdlib-dataclasses-with-basemodel" class="external-link" target="_blank">内置的 `dataclasses`</a>。

打开浏览器访问 <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>。

你将看到如下的 JSON 响应：

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

### 交互式 API 文档

跳转到 <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>。

你将会看到自动生成的交互式 API 文档（由 <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank">Swagger UI</a> 提供）：

			Name:   "ndjson",
			Hidden: true,
		},
		cli.BoolFlag{
			Usage: "display inline data keys and sizes",
			Name:  "data",
		},
		cli.BoolFlag{
			Usage: "export inline data",
			Name:  "export",
		},
		cli.BoolFlag{
			Usage: "combine inline data",
			Name:  "combine",
		},
		cli.BoolFlag{
			Usage: "combine inline data across versions when size matches",
			Name:  "xver",
		},
	}

import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import java.util.List;
import java.util.Map.Entry;
import org.junit.Ignore;

/**
 * Testers for {@link ListMultimap#put(Object, Object)}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.

import com.google.common.collect.Multimap;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import org.junit.Ignore;

/**
 * Tester for {@link Multimap#containsEntry}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")