}
  }

  /** Prepares the [request] to be executed at some point in the future. */
  override fun newCall(request: Request): Call = RealCall(this, request, forWebSocket = false)

  /** Uses [request] to connect a new web socket. */
  override fun newWebSocket(
    request: Request,
    listener: WebSocketListener,
  ): WebSocket {
    val webSocket =

          "legendFormat": "{{ source_workload }}.{{ source_workload_namespace }} : {{ response_code }}",
          "refId": "B",
          "step": 2
        }
      ],
      "title": "Incoming Requests By Source And Response Code",
      "type": "timeseries"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${datasource}"
      },
      "fieldConfig": {

			Optional:    true,
			Type:        "duration",
		},
		config.HelpKV{
			Key:         IOCount,
			Description: `maximum IO requests allowed between objects to slow down heal operation` + defaultHelpPostfix(IOCount),
			Optional:    true,
			Type:        "int",
		},
		config.HelpKV{
			Key:         DriveWorkers,

 */
public class MessageDigestHashFunctionTest extends TestCase {
  private static final ImmutableSet<String> INPUTS = ImmutableSet.of("", "Z", "foobar");

  // From "How Provider Implementations Are Requested and Supplied" from
  // http://docs.oracle.com/javase/6/docs/technotes/guides/security/crypto/CryptoSpec.html
  //  - Some providers may choose to also include alias names.

## Review Pull Requests

You can help me review pull requests from others.

Again, please try your best to be kind. 🤗

---

Here's what to keep in mind and how to review a pull request:

### Understand the problem

  /**
   * 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

   * {@linkplain Range#contains(Comparable) contained} within the range.
   *
   * <p>Note that this method will return ranges with unbounded endpoints if {@link BoundType#OPEN}
   * is requested for a domain minimum or maximum. For example, if {@code set} was created from the
   * range {@code [1..Integer.MAX_VALUE]} then {@code set.range(CLOSED, OPEN)} must return {@code
   * [1..∞)}.
   *

  repeated string verbs = 1;

  // APIGroups is the name of the APIGroup that contains the resources.  If multiple API groups are specified, any action requested against one of
  // the enumerated resources in any API group will be allowed. "" represents the core API group and "*" represents all API groups.
  // +optional
  repeated string apiGroups = 2;

				return errDiskNotFound
			}
			err := localDrives[index].MakeVol(ctx, bucket)
			if opts.ForceCreate && errors.Is(err, errVolumeExists) {
				// No need to return error when force create was
				// requested.
				return nil
			}
			return err
		}, index)
	}

	errs := g.Wait()
	return reduceWriteQuorumErrs(ctx, errs, bucketOpIgnoredErrs, (len(localDrives)/2)+1)

本例没有实现回调本身（只是一行代码），只有文档部分。

/// tip | "提示"

实际的回调只是 HTTP 请求。

实现回调时，要使用 <a href="https://www.encode.io/httpx/" class="external-link" target="_blank">HTTPX</a> 或 <a href="https://requests.readthedocs.io/" class="external-link" target="_blank">Requests</a>。

///

## 编写回调文档代码

应用不执行这部分代码，只是用它来*记录 外部 API* 。

但，您已经知道用 **FastAPI** 创建自动 API 文档有多简单了。

我们要使用与存档*外部 API* 相同的知识……通过创建外部 API 要实现的*路径操作*（您的 API 要调用的）。