/**
   * When we need a new thread to run tasks, we call [Backend.execute]. A few microseconds later we
   * expect a newly-started thread to call [Runnable.run]. We shouldn't request new threads until
   * the already-requested ones are in service, otherwise we might create more threads than we need.
   *
   * We use [executeCallCount] and [runCallCount] to defend against starting more threads than we
   * need. Both fields are guarded by `this`.
   */

        // Those two public constants are initialized here, as they need all the private constants
        // above to be initialized first, but the code style imposes the public constants to be
        // defined above the private ones...
        OS_FAMILY = getOsFamily();
        IS_WINDOWS = isFamily(FAMILY_WINDOWS);
    }

    private Os() {}

    /**
     * Determines if the OS on which Maven is executing matches the

For this, use the Python standard module [`secrets`](https://docs.python.org/3/library/secrets.html) to check the username and password.

`secrets.compare_digest()` needs to take `bytes` or a `str` that only contains ASCII characters (the ones in English), this means it wouldn't work with characters like `á`, as in `Sebastián`.

To handle that, we first convert the `username` and `password` to `bytes` encoding them with UTF-8.

   *         .build();
   * }
   *
   * <p>Builder instances can be reused; it is safe to call {@link #build} multiple times to build
   * multiple graphs in series. Each new graph contains all the elements of the ones created before
   * it.
   *
   * @since 28.0
   */
  public static class Builder<N, V> {

    private final MutableValueGraph<N, V> mutableValueGraph;

 *
 *  * **Closing:** one of the peers on the web socket has initiated a graceful shutdown. The web
 *    socket will continue to transmit already-enqueued messages but will refuse to enqueue new
 *    ones.
 *
 *  * **Closed:** the web socket has transmitted all of its messages and has received all messages
 *    from the peer.
 *
 * Web sockets may fail due to HTTP upgrade problems, connectivity problems, or if either peer

    e) Declining to grant rights under trademark law for use of some
    trade names, trademarks, or service marks; or

    f) Requiring indemnification of licensors and authors of that
    material by anyone who conveys the material (or modified versions of
    it) with contractual assumptions of liability to the recipient, for
    any liability that these contractual assumptions directly impose on
    those licensors and authors.

    for (Future<?> result : results) {
      if (!result.isCancelled()) {
        result.get(10, SECONDS);
      }
      // TODO(cpovirk): Verify that the cancelled futures are exactly ones that we expect.
    }

    assertThat(logHandler.getStoredLogRecords()).isEmpty();
  }

  public void testAvoidsStackOverflow_manySubmitted() throws Exception {

이 모든 내용은 OpenAPI에 결합되어 포함되고, API 문서에 표시됩니다:

<img src="/img/tutorial/additional-responses/image01.png">

## 미리 정의된 응답과 커스텀 응답 결합하기 { #combine-predefined-responses-and-custom-ones }

여러 *경로 처리*에 적용되는 미리 정의된 응답이 필요할 수도 있지만, 각 *경로 처리*마다 필요한 커스텀 응답과 결합하고 싶을 수도 있습니다.

그런 경우 Python의 `dict` “unpacking” 기법인 `**dict_to_unpack`을 사용할 수 있습니다:

```Python
old_dict = {
    "old key": "old value",

所有这些都会被合并并包含到你的 OpenAPI 中，并显示在 API 文档里：

<img src="/img/tutorial/additional-responses/image01.png">

## 组合预定义响应和自定义响应 { #combine-predefined-responses-and-custom-ones }

你可能希望有一些适用于许多*路径操作*的预定义响应，但同时又想把它们与每个*路径操作*所需的自定义响应组合在一起。

在这些情况下，你可以使用 Python 的“解包”`dict` 的技巧 `**dict_to_unpack`：

```Python
old_dict = {
    "old key": "old value",

- asking to use a plugin for which you do not have a version defined - tools to easily select versions
- goal not found in a plugin (probably could list the ones that are)

 */

// PluginNotFoundException, PluginResolutionException, PluginDescriptorParsingException,
// CycleDetectedInPluginGraphException;

/**
 * Transform an exception into useful end-user message.
 */