@GwtCompatible
public interface Multimap<K extends @Nullable Object, V extends @Nullable Object> {
  // Query Operations

  /**
   * Returns the number of key-value pairs in this multimap.
   *
   * <p><b>Note:</b> this method does not return the number of <i>distinct keys</i> in the multimap,
   * which is given by {@code keySet().size()} or {@code asMap().size()}. See the opening section of
   * the {@link Multimap} class documentation for clarification.

FastAPIはこれをするために、Pydanticモデルの`.dict()`を<a href="https://docs.pydantic.dev/latest/concepts/serialization/#modeldict" class="external-link" target="_blank">その`exclude_unset`パラメータ</a>で使用しています。

///

/// info | 情報

以下も使用することができます:

* `response_model_exclude_defaults=True`
* `response_model_exclude_none=True`

MockWebServer
=============

A scriptable web server for testing HTTP clients


### Motivation

This library makes it easy to test that your app Does The Right Thing when it
makes HTTP and HTTPS calls. It lets you specify which responses to return and
then verify that requests were made as expected.

Because it exercises your full HTTP stack, you can be confident that you're

 * String escapedXml = XmlUtil.escapeXml("<tag>value</tag>");
 * Map<String, Object> dataMap = XmlUtil.getDataMap(accessResultData);
 * }
 * </pre>
 *
 * <h2>Thread Safety:</h2>
 * <p>
 * This class is thread-safe as it does not maintain any state.
 * </p>
 *
 * <h2>Dependencies:</h2>
 * <ul>
 *   <li>org.apache.logging.log4j.Logger</li>
 *   <li>org.apache.logging.log4j.LogManager</li>
 *   <li>org.xml.sax.InputSource</li>

                logger.info("ThumbnailGenerator is stopped.");
            }
            exitCode = Constants.EXIT_FAIL;
        } catch (final Throwable t) {
            logger.error("ThumbnailGenerator does not work correctly.", t);
            exitCode = Constants.EXIT_FAIL;
        } finally {
            if (systemMonitorTask != null) {
                systemMonitorTask.cancel();
            }

  /** True if the [activeTask] should be canceled when it completes. */
  internal var cancelActiveTask = false

  /**
   * Returns a snapshot of tasks currently scheduled for execution. Does not include the
   * currently-executing task unless it is also scheduled for future execution.
   */
  val scheduledTasks: List<Task>
    get() = taskRunner.withLock { futureTasks.toList() }

  /**

# WebSockets

Puedes usar <a href="https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API" class="external-link" target="_blank">WebSockets</a> con **FastAPI**.

## Instalar `WebSockets`

Asegúrate de crear un [entorno virtual](../virtual-environments.md){.internal-link target=_blank}, activarlo e instalar `websockets`:

<div class="termy">

```console
$ pip install websockets

---> 100%
```

</div>

        return escapeSlow(s, i);
      }
    }
    return s;
  }

  /**
   * Escapes a single character using the replacement array and safe range values. If the given
   * character does not have an explicit replacement and lies outside the safe range then {@link
   * #escapeUnsafe} is called.
   *
   * @return the replacement characters, or {@code null} if no escaping was required
   */
  @Override

          required: true
        - label: I already searched in Google "How to X in FastAPI" and didn't find any information.
          required: true
        - label: I already read and followed all the tutorial in the docs and didn't find an answer.
          required: true
        - label: I already checked if it is not related to FastAPI but to [Pydantic](https://github.com/pydantic/pydantic).
          required: true

# WebSockets

Sie können <a href="https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API" class="external-link" target="_blank">WebSockets</a> mit **FastAPI** verwenden.

## `WebSockets` installieren

Zuerst müssen Sie `WebSockets` installieren:

<div class="termy">

```console
$ pip install websockets

---> 100%
```

</div>

## WebSockets-Client

### In Produktion