}

	// Combined timeout for the lock attempt.
	ctx, cancel := context.WithTimeout(ctx, ds.Timeouts.Acquire)
	defer cancel()

	// Special context for NetLockers - do not use timeouts.
	// Also, pass the trace context info if found for debugging
	netLockCtx := context.Background()

	tc, ok := ctx.Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
	if ok {

// This may only be set ONCE before use.
func (h *SingleHandler[Req, Resp]) IgnoreNilConn() *SingleHandler[Req, Resp] {
	if h.ignoreNilConn {
		gridLogOnceIf(context.Background(), fmt.Errorf("%s: IgnoreNilConn called twice", h.id.String()), h.id.String()+"IgnoreNilConn")
	}
	h.ignoreNilConn = true
	return h
}

// WithSharedResponse indicates it is unsafe to reuse the response
// when it has been returned on a handler.

#### 임의의 항목 { #a-random-item }

`data.items()`를 사용하면 각 딕셔너리 항목의 키와 값을 담은 튜플로 구성된 <dfn title="리스트, 세트 등처럼 for 루프로 순회할 수 있는 것">이터러블 객체</dfn>를 얻습니다.

이 이터러블 객체를 `list(data.items())`로 적절한 `list`로 변환합니다.

그 다음 `random.choice()`로 리스트에서 **무작위 값**을 얻어 `(id, name)` 형태의 튜플을 얻습니다. 예를 들어 `("imdb-tt0371724", "The Hitchhiker's Guide to the Galaxy")` 같은 값이 될 것입니다.

그 다음 이 튜플의 **두 값을** 변수 `id`와 `name`에 **할당**합니다.

따라서 사용자가 아이템 ID를 제공하지 않더라도, 무작위 추천을 받게 됩니다.

    and a [python tracer](https://www.tensorflow.org/guide/profiler#events)
    which allows you to trace python function calls in your model. Usability
    improvements include better diagnostic messages and
    [profile options](https://tensorflow.org/guide/profiler#collect_performance_data)
    to customize the host and device trace verbosity level.

*   Introduces experimental support for Keras Preprocessing Layers API

#### 一个随机条目 { #a-random-item }

使用 `data.items()` 我们会得到一个包含每个字典项键和值的元组的 <dfn title="可以用 for 循环迭代的对象，例如 list、set 等">可迭代对象</dfn>。

我们用 `list(data.items())` 把这个可迭代对象转换成一个真正的 `list`。

然后用 `random.choice()` 可以从该列表中获取一个**随机值**，也就是一个 `(id, name)` 的元组。它可能像 `("imdb-tt0371724", "The Hitchhiker's Guide to the Galaxy")` 这样。

接着我们把这个元组的**两个值**分别赋给变量 `id` 和 `name`。

所以，即使用户没有提供条目 ID，他们仍然会收到一个随机推荐。

    // Add all locations to the scanned set so that in a classpath [jar1, jar2], where jar1 has a
    // manifest with Class-Path pointing to jar2, we won't scan jar2 twice.
    Set<File> scanned = new HashSet<>();
    for (LocationInfo location : locations) {
      scanned.add(location.file());
    }

    // Scan all locations

     * for this entry is one, this is simply the string representation of the corresponding element.
     * Otherwise, it is the string representation of the element, followed by the three characters
     * {@code " x "} (space, letter x, space), followed by the count.
     */
    @Override
    String toString();
  }

  /**

 * <i>endpoint</i> value, and the range is considered to be either <i>open</i> (does not include the
 * endpoint) or <i>closed</i> (includes the endpoint) on that side. With three possibilities on each
 * side, this yields nine basic types of ranges, enumerated below. (Notation: a square bracket
 * ({@code [ ]}) indicates that the range is closed on that side; a parenthesis ({@code ( )}) means

    FailedService(Service service) {
      super(
          service.toString(),
          service.failureCause(),
          false /* don't enable suppression */,
          false /* don't calculate a stack trace. */);
    }
  }

      }
      assertThat(remaining).isEqualTo(0);
      assertIntact(queue);
      assertThat(queue).containsExactlyElementsIn(elements);
    }
  }

  private enum Element {
    ONE,
    TWO,
    THREE,
    FOUR,
    FIVE;
  }

  public void testRandomAddsAndRemoves_duplicateElements() {
    Random random = new Random(0);
    Multiset<Element> elements = HashMultiset.create();