* limitations under the License.
 */

package com.google.common.util.concurrent;

import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/** Unit tests for {@link ForwardingBlockingQueue} */
@NullUnmarked
public class ForwardingBlockingQueueTest extends TestCase {
  public void testForwarding() {
    ForwardingObjectTester.testForwardingObject(ForwardingBlockingQueue.class);
  }

 * limitations under the License.
 */

package com.google.common.util.concurrent;

import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/** Unit tests for {@link ForwardingFuture} */
@NullUnmarked
public class ForwardingFutureTest extends TestCase {
  public void testForwarding() {
    ForwardingObjectTester.testForwardingObject(ForwardingFuture.class);
  }

 * limitations under the License.
 */

package com.google.common.util.concurrent;

import org.jspecify.annotations.NullUnmarked;

/**
 * Tests for {@link Monitor}'s interruptible methods.
 *
 * @author Justin T. Sampson
 */
@NullUnmarked
public class InterruptibleMonitorTest extends MonitorTestCase {

  public InterruptibleMonitorTest() {
    super(true);
  }

 * limitations under the License.
 */

package com.google.common.util.concurrent;

import org.jspecify.annotations.NullUnmarked;

/**
 * Tests for {@link Monitor}'s uninterruptible methods.
 *
 * @author Justin T. Sampson
 */
@NullUnmarked
public class UninterruptibleMonitorTest extends MonitorTestCase {

  public UninterruptibleMonitorTest() {
    super(false);

     * Finally, return the result of the last expression part's resolution.</p>
     *
     * <p><b>NOTE:</b> The object-graph navigation actually takes place via the
     * {@link ReflectionValueExtractor} class.</p>
     */
    @Override
    public Object getValue(String expression) {
        if (expression == null || expression.trim().isEmpty()) {
            return null;
        }

                context, context.invokerRequest.coreExtensions().orElseThrow());
    }

    /**
     * Selects extensions to load discovered from various sources by precedence ("first wins"), as
     * {@link InvokerRequest#coreExtensions()} is in precedence order. Also reports conflicts, if any.
     * Finally, at DEBUG level reports configured vs selected extensions.
     */

在这里，你将看到关于**多个主题**的不同诀窍或“如何操作”指南。

这些方法多数是**相互独立**的，在大多数情况下，你只需在这些内容适用于**你的项目**时才需要学习它们。

如果某些内容看起来对你的项目有用，请继续查阅，否则请直接跳过它们。

/// tip | 小技巧

如果你想以系统的方式**学习 FastAPI**（推荐），请阅读 [教程 - 用户指南](../tutorial/index.md){.internal-link target=_blank} 的每一章节。

Um das zu tun, verwenden Sie den Standard-Python-Typhinweis <a href="https://docs.python.org/3/library/typing.html#typing.Union" class="external-link" target="_blank">`typing.Union`</a>:

/// note | Hinweis

Для этого используйте стандартную аннотацию типов в Python <a href="https://docs.python.org/3/library/typing.html#typing.Union" class="external-link" target="_blank">`typing.Union`</a>:

/// note | Примечание

import java.util.Iterator;
import java.util.LinkedList;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link Synchronized#deque} and {@link Queues#synchronizedDeque}.
 *
 * @author Kurt Alfred Kluever
 */
@NullUnmarked
public class SynchronizedDequeTest extends TestCase {

  protected Deque<String> create() {