终于，我们英雄的身份得到了保护！🥷

它还重新声明了 `id: int`。这样我们便与 API 客户端建立了一种**约定**，使他们始终可以期待 `id` 存在并且是一个整数 `int`（永远不会是 `None`）。

/// tip | 提示

确保返回模型始终提供一个值并且始终是 `int`（而不是 `None`）对 API 客户端非常有用，他们可以在这种确定性下编写更简单的代码。

此外，**自动生成的客户端**将拥有更简洁的接口，这样与你的 API 交互的开发者就能更轻松地使用你的 API。😎

///

`HeroPublic` 中的所有字段都与 `HeroBase` 中的相同，其中 `id` 声明为 `int`（不是 `None`）：

* `id`
* `name`
* `age`

	pos int64       // Current position in sparse file
}

func (sw *sparseFileWriter) Write(b []byte) (n int, err error) {
	overwrite := int64(len(b)) > sw.logicalRemaining()
	if overwrite {
		b = b[:sw.logicalRemaining()]
	}

	b0 := b
	endPos := sw.pos + int64(len(b))
	for endPos > sw.pos && err == nil {
		var nf int // Bytes written in fragment
		dataStart, dataEnd := sw.sp[0].Offset, sw.sp[0].endOffset()

    data class Success(val buildFileText: String) : BuildFileMutation
    data class Failure(val message: String) : BuildFileMutation
}


private
fun <T> List<T>.indexOfFirst(startIndex: Int, predicate: (T) -> Boolean): Int {
    require(startIndex in indices) {
        "startIndex must be in range [0, $size): $startIndex"
    }
    return this.subList(startIndex, size).indexOfFirst(predicate).let {

              protected Set<String> create(String[] elements) {
                String[] deduped = dedupe(elements);
                return new AbstractSet<String>() {
                  @Override
                  public int size() {
                    return deduped.length;
                  }

                  @Override
                  public Iterator<String> iterator() {

        }
        if (mocks != null) {
            mocks.close();
        }
    }

    @Test
    public void testRequestDirectoryLease() {
        String directoryPath = "/test/dir";
        int requestedState = DirectoryLeaseState.DIRECTORY_READ_HANDLE;
        DirectoryCacheScope scope = DirectoryCacheScope.IMMEDIATE_CHILDREN;
        Smb2LeaseKey expectedKey = new Smb2LeaseKey();

    /**
     * Constructs a new suggest request.
     */
    public SuggestRequest() {
        // nothing
    }

    private String index = null;

    private String query = "";

    private int size = 10;

    private final List<String> tags = new ArrayList<>();

    private final List<String> roles = new ArrayList<>();

    private final List<String> fields = new ArrayList<>();

     * Verify the CRUD mode.
     * @param crudMode The CRUD mode.
     * @param expectedMode The expected mode.
     * @param dictId The dictionary ID.
     */
    protected void verifyCrudMode(final int crudMode, final int expectedMode, final String dictId) {
        if (crudMode != expectedMode) {
            throwValidationError(messages -> {

  }

  @SuppressWarnings("unchecked")
  public static <E extends Comparable<? super E>> ImmutableSortedSet<E> of(
      E e1, E e2, E e3, E e4, E e5, E e6, E... remaining) {
    int size = remaining.length + 6;
    List<E> all = new ArrayList<E>(size);
    Collections.addAll(all, e1, e2, e3, e4, e5, e6);
    Collections.addAll(all, remaining);
    // This is messed up. See TODO at top of file.

	// listings.
	ContinueAt string

	// Limit limits the number of elements returned by
	// a single list operation. If <= 0, a reasonable
	// limit is selected automatically.
	Limit int
}

// CreateKeyRequest is a structure containing fields
// and options for creating keys.
type CreateKeyRequest struct {
	// Name is the name of the key that gets created.
	Name string
}

        return ITEM_ENDPOINT_SUFFIX + "/" + dictId;
    }

    @Override
    protected String getDictType() {
        return DICT_TYPE;
    }

    @Override
    protected Map<String, Object> createTestParam(int id) {
        final Map<String, Object> requestBody = new HashMap<>();
        final String keyProp = NAME_PREFIX + id;
        requestBody.put(KEY_PROPERTY, keyProp);
        requestBody.put("segmentation", "segment");