// [io.ByteScanner], and [io.RuneScanner] interfaces by reading from
// a byte slice.
// Unlike a [Buffer], a Reader is read-only and supports seeking.
// The zero value for Reader operates like a Reader of an empty slice.
type Reader struct {
	s        []byte
	i        int64 // current reading index
	prevRune int   // index of previous rune; or < 0
}

// Len returns the number of bytes of the unread portion of the
// slice.

     */
    public static final String HTTP_STATUS_CODE = "httpStatusCode";

    /**
     * Field name for method.
     */
    public static final String METHOD = "method";

    /**
     * Field name for MIME type.
     */
    public static final String MIME_TYPE = "mimeType";

    /**
     * Field name for creation time.
     */
    public static final String CREATE_TIME = "createTime";

    /**

        runner = new OpenSearchRunner();
        runner.onBuild((number, settingsBuilder) -> {
            settingsBuilder.put("http.cors.enabled", true);
            settingsBuilder.put("discovery.type", "single-node");
        })
                .build(newConfigs().clusterName("PopularWordsRequestTest")
                        .numOfNode(1)

    - `Path()`
    - `Query()`
    - `Header()`
    - `Cookie()`
- [`Request Body Object` 中的 `content` 字段里的 `Media Type Object`（规范中）](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#media-type-object)，被 FastAPI 的以下内容使用：
    - `Body()`
    - `File()`
    - `Form()`

/// info | 信息

   * Collections#emptyList}, and is preferable mainly for consistency and maintainability of your
   * code.
   *
   * <p><b>Performance note:</b> the instance returned is a singleton.
   */
  // Casting to any type is safe because the list will never hold any elements.
  @SuppressWarnings("unchecked")
  public static <E> ImmutableList<E> of() {
    return (ImmutableList<E>) EMPTY;
  }

  /**

   *
   * <p>The caller is responsible for ensuring that the returned writer is closed.
   *
   * @throws IOException if an I/O error occurs while opening the writer
   * @since 15.0 (in 14.0 with return type {@link BufferedWriter})
   */
  public Writer openBufferedStream() throws IOException {
    Writer writer = openStream();
    return (writer instanceof BufferedWriter)
        ? (BufferedWriter) writer

    /* Test that it can be empty. */
    EnumBiMap<Currency, Country> emptyBimap = EnumBiMap.create(Currency.class, Country.class);
    EnumHashBiMap<Currency, Country> bimap3 = // use exact type
        EnumHashBiMap.create(emptyBimap);
    assertEquals(bimap3, emptyBimap);
  }

  @GwtIncompatible // keyType
  public void testKeyType() {

                                        <div class="col-sm-9">
                                            <la:errors property="attributes.uidNumber"/>
                                            <input type="number" id="attributes.uidNumber" name="attributes.uidNumber" class="form-control"/>
                                        </div>
                                    </div>

    return CollectCollectors.toImmutableSortedMap(
        comparator, keyFunction, valueFunction, mergeFunction);
  }

  // unsafe, comparator() returns a comparator on the specified type
  @SuppressWarnings("unchecked")
  public static <K, V> ImmutableSortedMap<K, V> of() {
    return new Builder<K, V>((Comparator<K>) NATURAL_ORDER).build();
  }

	}

	var item madmin.SRIAMItem
	if err := parseJSONBody(ctx, r.Body, &item, ""); err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	var err error
	switch item.Type {
	default:
		err = errSRInvalidRequest(errInvalidArgument)
	case madmin.SRIAMItemPolicy:
		if item.Policy == nil {
			err = globalSiteReplicationSys.PeerAddPolicyHandler(ctx, item.Name, nil, item.UpdatedAt)