描述内容比较长且占用多行时，可以在函数的 <abbr title="函数中作为第一个表达式，用于文档目的的一个多行字符串（并没有被分配个任何变量）">docstring</abbr> 中声明*路径操作*的描述，**FastAPI** 支持从文档字符串中读取描述内容。

文档字符串支持 <a href="https://en.wikipedia.org/wiki/Markdown" class="external-link" target="_blank">Markdown</a>，能正确解析和显示 Markdown 的内容，但要注意文档字符串的缩进。

```Python hl_lines="19-27"
{!../../docs_src/path_operation_configuration/tutorial004.py!}
```

下图为 Markdown 文本在 API 文档中的显示效果：

    }
    Object result;
    try {
      result = supplier.get();
    } catch (Throwable t) {
      if (predicate.apply(t)) {
        // We are careful to set up INSTANCE_OF to match each Predicate to its target Class.
        @SuppressWarnings("unchecked")
        T caught = (T) t;
        return caught;
      }
      throw new AssertionError(

    }
    Object result;
    try {
      result = supplier.get();
    } catch (Throwable t) {
      if (predicate.apply(t)) {
        // We are careful to set up INSTANCE_OF to match each Predicate to its target Class.
        @SuppressWarnings("unchecked")
        T caught = (T) t;
        return caught;
      }
      throw new AssertionError(

    }
    Object result;
    try {
      result = supplier.get();
    } catch (Throwable t) {
      if (predicate.apply(t)) {
        // We are careful to set up INSTANCE_OF to match each Predicate to its target Class.
        @SuppressWarnings("unchecked")
        T caught = (T) t;
        return caught;
      }
      throw new AssertionError(

  /** Keys are edges incoming to the origin node, values are the source node. */
  final Map<E, N> inEdgeMap;

  /** Keys are edges outgoing from the origin node, values are the target node. */
  final Map<E, N> outEdgeMap;

  private int selfLoopCount;

  AbstractDirectedNetworkConnections(Map<E, N> inEdgeMap, Map<E, N> outEdgeMap, int selfLoopCount) {
    this.inEdgeMap = checkNotNull(inEdgeMap);

    disabled = user_dict["disabled"],
    hashed_password = user_dict["hashed_password"],
)
```

/// info | "说明"

`user_dict` 的说明，详见[**更多模型**一章](../extra-models.md#user_indict){.internal-link target=_blank}。

///

## 返回 Token

`token` 端点的响应必须是 JSON 对象。

响应返回的内容应该包含 `token_type`。本例中用的是**Bearer**Token，因此， Token 类型应为**`bearer`**。

返回内容还应包含 `access_token` 字段，它是包含权限 Token 的字符串。

            result.setScriptType(DfTypeUtil.toString(source.get("scriptType")));
            result.setStartTime(DfTypeUtil.toLong(source.get("startTime")));
            result.setTarget(DfTypeUtil.toString(source.get("target")));
            return updateEntity(source, result);
        } catch (InstantiationException | IllegalAccessException e) {
            final String msg = "Cannot create a new instance: " + entityType.getName();

            result.setGenerator(DfTypeUtil.toString(source.get("generator")));
            result.setPath(DfTypeUtil.toString(source.get("path")));
            result.setTarget(DfTypeUtil.toString(source.get("target")));
            result.setThumbnailId(DfTypeUtil.toString(source.get("thumbnail_id")));
            return updateEntity(source, result);
        } catch (InstantiationException | IllegalAccessException e) {

        return Arrays.asList(repositorySystem.buildArtifactRepository(repository));
    }

    protected ArtifactRepository getLocalRepository() throws Exception {
        File repoDir = new File(getBasedir(), "target/local-repo").getAbsoluteFile();

        return repositorySystem.createLocalRepository(repoDir);
    }

    @Test
    void testThatASystemScopedDependencyIsNotResolvedFromRepositories() throws Exception {

                                                    <button type="button" class="btn btn-danger"
                                                            data-toggle="modal" data-target="#confirmToDeleteAll">
                                                        <em class="fa fa-trash">
                                                        <la:message key="labels.failure_url_delete_all_link"/>