}

  private static final ImmutableRangeSet<Integer> RANGE_SET_ONE =
      ImmutableRangeSet.<Integer>builder()
          .add(Range.closed(2, 4))
          .add(Range.open(6, 7))
          .add(Range.closedOpen(8, 10))
          .add(Range.openClosed(15, 17))
          .build();

  private static final ImmutableRangeSet<Integer> RANGE_SET_TWO =
      ImmutableRangeSet.<Integer>builder()
          .add(Range.openClosed(0, 3))

你的回應模型可能有預設值，例如：

{* ../../docs_src/response_model/tutorial004_py310.py hl[9,11:12] *}

* `description: Union[str, None] = None`（或在 Python 3.10 中的 `str | None = None`）預設為 `None`。
* `tax: float = 10.5` 預設為 `10.5`。
* `tags: List[str] = []` 預設為空的 list：`[]`。

但如果這些值其實沒有被儲存，你可能想要在結果中省略它們。

例如，如果你在 NoSQL 資料庫中有包含許多選擇性屬性的模型，但你不想傳送充滿預設值的冗長 JSON 回應。

    - [Server Binaries](#server-binaries-4)
    - [Node Binaries](#node-binaries-4)
  - [Changelog since v1.8.10](#changelog-since-v1810)
    - [Action Required](#action-required-1)
    - [Other notable changes](#other-notable-changes-4)
- [v1.8.10](#v1810)
  - [Downloads for v1.8.10](#downloads-for-v1810)
    - [Client Binaries](#client-binaries-5)
    - [Server Binaries](#server-binaries-5)

        listOf("8.2", "8.4"), // 8.2 <=version < 8.4
        listOf("8.4", "8.6"), // 8.4 <=version < 8.6
        listOf("8.6", "8.8"), // 8.6 <=version < 8.8
        listOf("8.8", "8.10"), // 8.8 <=version < 8.10
        listOf("8.10", "8.12"), // 8.10 <=version < 8.12
        listOf("8.12", "8.13"), // 8.12 <=version < 8.13
        listOf("8.13", "9.0"), // 8.13 <=version < 9.0
        listOf("9.0", "9.3"), // 9.0 <=version < 9.3

    //      last modified: 105 seconds ago
    //             served:   5 seconds ago
    //   default lifetime: (105 - 5) / 10 = 10 seconds
    //            expires:  10 seconds from served date = 5 seconds from now
    server.enqueue(
      MockResponse
        .Builder()
        .addHeader("Last-Modified: " + formatDate(-105, TimeUnit.SECONDS))

        new ImmutableRangeMap.Builder<Integer, Integer>()
            .put(Range.closed(2, 4), 5)
            .put(Range.open(6, 7), 3)
            .put(Range.closedOpen(8, 10), 4)
            .put(Range.openClosed(15, 17), 2)
            .build();

    ImmutableMap<Range<Integer>, Integer> test = nonEmptyRangeMap.asMapOfRanges();

    for (Range<Integer> range : test.keySet()) {

  var KEY_CODES = {
    BACKSPACE: 8,
    ENTER: 13,
    SPACE: 32,
    UP: 38,
    DOWN: 40,
    DELETE: 46,
    NUM_0: 48,
    NUM_9: 57,
    A: 65,
    Z: 90,
    NUMPAD_0: 96,
    NUMPAD_9: 105,
    SEMICOLON: 186,
    EQUALS: 187,
    DASH: 189,
    FORWARD_SLASH: 191,
    GRAVE: 192,
    OPEN_BRACKET: 219,
    BACK_SLASH: 220,
    CLOSE_BRACKET: 221,
    SINGLE_QUOTE: 222
  };

    - [Server Binaries](#server-binaries-7)
    - [Node Binaries](#node-binaries-7)
  - [Changelog since v1.10.5](#changelog-since-v1105)
    - [Action Required](#action-required-1)
    - [Other notable changes](#other-notable-changes-7)
- [v1.10.5](#v1105)
  - [Downloads for v1.10.5](#downloads-for-v1105)
    - [Client Binaries](#client-binaries-8)
    - [Server Binaries](#server-binaries-8)

| com.squareup.okhttp3:mockwebserver:5.0.0         | okhttp3.mockwebserver | Obsolete. Depends on JUnit 4.     |

**OkHttp now supports Happy Eyeballs ([RFC 8305][rfc_8305]) for IPv4+IPv6 networks.** It attempts
both IPv6 and IPv4 connections concurrently, keeping whichever connects first.

**We’ve improved our Kotlin APIs.** You can skip the builder:

```kotlin

      clientReader.processNextFrame()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Unexpected rsv3 flag")
    }
  }

  @Test fun clientSentFramesMustBeMasked() {
    data.write("8100".decodeHex())
    assertFailsWith<ProtocolException> {
      serverReader.processNextFrame()
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("Client-sent frames must be masked.")
    }