"Toán tử" ở đây được nhắc tới là một trong các "phương thức" HTTP.

Một trong những:

* `POST`
* `GET`
* `PUT`
* `DELETE`

...và một trong những cái còn lại:

* `OPTIONS`
* `HEAD`
* `PATCH`
* `TRACE`

Trong giao thức HTTP, bạn có thể giao tiếp trong mỗi đường dẫn sử dụng một (hoặc nhiều) trong các "phương thức này".

---

  }

  // Not specifying KNOWN_ORDER for PriorityQueue and PriorityBlockingQueue
  // even though they do have it, because our tests interpret KNOWN_ORDER to
  // also mean that the iterator returns the head element first, which those
  // don't.

  public Test testsForPriorityBlockingQueue() {
    return QueueTestSuiteBuilder.using(
            new TestStringQueueGenerator() {
              @Override

        ImmutableList.of(
            ListTestSuiteBuilder.using(new FloatsAsListGenerator()).named("Floats.asList"),
            ListTestSuiteBuilder.using(new FloatsAsListHeadSubListGenerator())
                .named("Floats.asList, head subList"),
            ListTestSuiteBuilder.using(new FloatsAsListTailSubListGenerator())
                .named("Floats.asList, tail subList"),
            ListTestSuiteBuilder.using(new FloatsAsListMiddleSubListGenerator())

        ImmutableList.of(
            ListTestSuiteBuilder.using(new FloatsAsListGenerator()).named("Floats.asList"),
            ListTestSuiteBuilder.using(new FloatsAsListHeadSubListGenerator())
                .named("Floats.asList, head subList"),
            ListTestSuiteBuilder.using(new FloatsAsListTailSubListGenerator())
                .named("Floats.asList, tail subList"),
            ListTestSuiteBuilder.using(new FloatsAsListMiddleSubListGenerator())

        ImmutableList.of(
            ListTestSuiteBuilder.using(new IntsAsListGenerator()).named("Ints.asList"),
            ListTestSuiteBuilder.using(new IntsAsListHeadSubListGenerator())
                .named("Ints.asList, head subList"),
            ListTestSuiteBuilder.using(new IntsAsListTailSubListGenerator())
                .named("Ints.asList, tail subList"),
            ListTestSuiteBuilder.using(new IntsAsListMiddleSubListGenerator())

#### Operation

ここでの「オペレーション」とは、HTTPの「メソッド」の1つを指します。

以下のようなものの1つ:

* `POST`
* `GET`
* `PUT`
* `DELETE`

...さらによりエキゾチックなもの:

* `OPTIONS`
* `HEAD`
* `PATCH`
* `TRACE`

HTTPプロトコルでは、これらの「メソッド」の1つ（または複数）を使用して各パスにアクセスできます。

---

APIを構築するときは、通常、これらの特定のHTTPメソッドを使用して特定のアクションを実行します。

通常は次を使用します:

* `POST`: データの作成
* `GET`: データの読み取り

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 * <b>indiscriminately</b> to the methods of the delegate. For example, overriding {@link
 * #add(Object, int)} alone <b>will not</b> change the behavior of {@link #add(Object)}, which can
 * lead to unexpected behavior. In this case, you should override {@code add(Object)} as well,
 * either providing your own implementation, or delegating to the provided {@code standardAdd}
 * method.
 *

    // 2. It's possible for subscribers to actually be dispatched to in a different order than they
    //    were added to the queue. It's easily possible for one thread to take the head of the
    //    queue, immediately followed by another thread taking the next element in the queue. That
    //    second thread can then dispatch to the subscriber it took before the first thread does.
    //

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