* Escreva mensagens a partir delas.
* Então feche uma das abas.

Isso levantará a exceção `WebSocketDisconnect`, e todos os outros clientes receberão uma mensagem como:

```
Client #1596980209979 left the chat
```

/// tip | Dica

O app acima é um exemplo mínimo e simples para demonstrar como lidar e transmitir mensagens para várias conexões WebSocket.

# downloaded TF as a zip archive).
export TFCI_GIT_DIR=$(cd $(dirname "$0"); realpath ../../)
cd "$TFCI_GIT_DIR"

# "TFCI" may optionally be set to the name of an env-type file with TFCI
# variables in it, OR may be left empty if the user has already exported the
# relevant variables in their environment. Because of 'set -o allexport' above
# (which is equivalent to "set -a"), every variable in the file is exported
# for other files to use.
#

                                    <la:link href="/admin/searchlist/search?q=${f:u(q)}" styleClass="btn btn-default">
                                        <i class="fa fa-arrow-circle-left" aria-hidden="true"></i>
                                        <la:message key="labels.crud_button_back"/>
                                    </la:link>

      sort(
          insertionOrder,
          new Comparator<V>() {
            @Override
            public int compare(V left, V right) {
              // The indexes are small enough for the subtraction trick to be safe.
              return indexOfEntryWithValue(left) - indexOfEntryWithValue(right);
            }

            int indexOfEntryWithValue(V value) {

     * Stores a collection of values with the same key in the built multimap.
     *
     * @throws NullPointerException if {@code key}, {@code values}, or any element in {@code values}
     *     is null. The builder is left in an invalid state.
     */
    @CanIgnoreReturnValue
    public Builder<K, V> putAll(K key, Iterable<? extends V> values) {
      if (key == null) {

    #   o diffIgnoredKeyList: list of ignored keys for differences (NotRequired)
    #   o maskedKeyList: list of masked keys for security (NotRequired)
    #   o isEnvOnlyFloatLeft: is it environment only? (and show as float-left?) (NotRequired)
    #   o extendsPropRequest: other request name of exnteds-properties (NotRequired)
    #   o isCheckImplicitOverride: does it check implicit override? (NotRequired)
    #
    #; propertiesHtmlMap = map:{

 * **Step down considerately**: Members of every project come and go. When somebody leaves or
   disengages from the project, they should make it known and take the proper steps to ensure that
   others can pick up where they left off.

This code is not exhaustive or complete. It serves to distill our common understanding of a
collaborative, shared environment, and goals. We expect it to be followed in spirit as much as in
the letter.

                            <div class="card-footer">
                                <button type="submit" class="btn btn-default" name="list" value="back">
                                    <i class="fa fa-arrow-circle-left" aria-hidden="true"></i>
                                    <la:message key="labels.crud_button_back"/>
                                </button>
                                <c:if test="${editable}">

尝试以下操作：

* 使用多个浏览器选项卡打开应用程序。
* 从这些选项卡中发送消息。
* 然后关闭其中一个选项卡。

这将引发 `WebSocketDisconnect` 异常，并且所有其他客户端都会收到类似以下的消息：

```
Client #1596980209979 left the chat
```

/// tip

上面的应用程序是一个最小和简单的示例，用于演示如何处理和向多个 WebSocket 连接广播消息。

但请记住，由于所有内容都在内存中以单个列表的形式处理，因此它只能在进程运行时工作，并且只能使用单个进程。

     * Stores a collection of values with the same key in the built multimap.
     *
     * @throws NullPointerException if {@code key}, {@code values}, or any element in {@code values}
     *     is null. The builder is left in an invalid state.
     */
    @CanIgnoreReturnValue
    public Builder<K, V> putAll(K key, Iterable<? extends V> values) {
      if (key == null) {