* cleartext and may be monitored or blocked by a proxy or other middlebox.
   */
  public val handshakeServerNames: List<String>,
  /** A string like `GET` or `POST`. */
  public val method: String,
  /**
   * The request target from the original HTTP request.
   *
   * For origin-form requests this is a path like `/index.html`, that is combined with the `Host`

      Collection<V> collection = multimap().get(key);
      multimap().clear();
      assertEmpty(collection);
    }
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = ZERO)
  public void testClearPropagatesToAsMapGet() {
    for (K key : sampleKeys()) {
      resetContainer();
      Collection<V> collection = multimap().asMap().get(key);
      if (collection != null) {

        return replacementMap.get(c);
      }
    };
  }

  // A trivial non-optimized escaper for testing.
  static UnicodeEscaper createSimpleUnicodeEscaper(ImmutableMap<Integer, char[]> replacementMap) {
    return new UnicodeEscaper() {
      @Override
      protected char @Nullable [] escape(int cp) {
        return replacementMap.get(cp);
      }
    };
  }

 *
 * <p>To use an existing supplier instance (say, named {@code supplier}) in a context where the
 * <i>other type</i> of supplier is expected, use the method reference {@code supplier::get}. A
 * future version of {@code com.google.common.base.Supplier} will be made to <i>extend</i> {@code
 * java.util.function.Supplier}, making conversion code necessary only in one direction. At that

  @Override
  public @Nullable V getIfPresent(Object key) {
    return delegate().getIfPresent(key);
  }

  /**
   * @since 11.0
   */
  @Override
  public V get(K key, Callable<? extends V> valueLoader) throws ExecutionException {
    return delegate().get(key, valueLoader);
  }

  /**
   * @since 11.0
   */
  @Override
  /*
   * <? extends Object> is mostly the same as <?> to plain Java. But to nullness checkers, they

- **CodeLens 导航** - 测试客户端调用（例如 `client.get('/items')`）上方的可点击链接，可跳转到匹配的*路径操作*，在测试与实现之间快速往返。
- **部署到 FastAPI Cloud** - 一键将你的应用部署到 [FastAPI Cloud](https://fastapicloud.com/)。
- **应用日志流式传输** - 从部署在 FastAPI Cloud 的应用中实时流式获取日志，并支持按级别过滤与文本搜索。

- **Route Search** - 使用 <kbd>Ctrl</kbd> + <kbd>Shift</kbd> + <kbd>E</kbd>（macOS：<kbd>Cmd</kbd> + <kbd>Shift</kbd> + <kbd>E</kbd>）依路徑、方法或名稱進行搜尋。
- **CodeLens Navigation** - 在測試用 client 呼叫（例如 `client.get('/items')`）上方提供可點連結，一鍵跳至對應的路徑操作，讓你在測試與實作間快速切換。
- **Deploy to FastAPI Cloud** - 一鍵將你的應用程式部署到 [FastAPI Cloud](https://fastapicloud.com/)。
- **Stream Application Logs** - 從部署於 FastAPI Cloud 的應用程式即時串流日誌，並支援層級篩選與文字搜尋。

from typing import Annotated

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(
    q: Annotated[str | None, Query(title="Query string", min_length=3)] = None,
):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

from fastapi import FastAPI, Response
from fastapi.responses import RedirectResponse

app = FastAPI()


@app.get("/portal", response_model=None)
async def get_portal(teleport: bool = False) -> Response | dict:
    if teleport:
        return RedirectResponse(url="https://www.youtube.com/watch?v=dQw4w9WgXcQ")

 * ordering of values for a given key. See the {@link Multimap} documentation for information common
 * to all multimaps.
 *
 * <p>The {@link #get}, {@link #removeAll}, and {@link #replaceValues} methods each return a {@link
 * List} of values. Though the method signature doesn't say so explicitly, the map returned by
 * {@link #asMap} has {@code List} values.
 *