*
   * @param queue the queue to be wrapped in a synchronized view
   * @return a synchronized view of the specified queue
   * @since 14.0
   */
  public static <E extends @Nullable Object> Queue<E> synchronizedQueue(Queue<E> queue) {
    return Synchronized.queue(queue, null);
  }

  /**
   * Returns a synchronized (thread-safe) deque backed by the specified deque. In order to guarantee

    // This dispatcher matches the original dispatch behavior of EventBus.

    /** Per-thread queue of events to dispatch. */
    private final ThreadLocal<Queue<Event>> queue =
        new ThreadLocal<Queue<Event>>() {
          @Override
          protected Queue<Event> initialValue() {
            return Queues.newArrayDeque();
          }
        };

    assertEquals(1, Queues.newLinkedBlockingDeque(1).remainingCapacity());
    assertEquals(11, Queues.newLinkedBlockingDeque(11).remainingCapacity());
  }

  public void testNewLinkedBlockingQueueCapacity() {
    assertThrows(IllegalArgumentException.class, () -> Queues.newLinkedBlockingQueue(0));
    assertEquals(1, Queues.newLinkedBlockingQueue(1).remainingCapacity());

    delayNanos: Long,
  ) {
    lock.assertHeld()

    val queue = task.queue!!
    check(queue.activeTask === task)

    val cancelActiveTask = queue.cancelActiveTask
    queue.cancelActiveTask = false
    queue.activeTask = null
    busyQueues.remove(queue)

    if (delayNanos != -1L && !cancelActiveTask && !queue.shutdown) {
      queue.scheduleAndDecide(task, delayNanos, recurrence = true)
    }

    final L listener;
    final Executor executor;

    @GuardedBy("this")
    final Queue<ListenerCallQueue.Event<L>> waitQueue = Queues.newArrayDeque();

    @GuardedBy("this")
    final Queue<Object> labelQueue = Queues.newArrayDeque();

    @GuardedBy("this")
    boolean isThreadScheduled;

    PerListenerQueue(L listener, Executor executor) {

    assertEquals(1, Queues.newLinkedBlockingDeque(1).remainingCapacity());
    assertEquals(11, Queues.newLinkedBlockingDeque(11).remainingCapacity());
  }

  public void testNewLinkedBlockingQueueCapacity() {
    assertThrows(IllegalArgumentException.class, () -> Queues.newLinkedBlockingQueue(0));
    assertEquals(1, Queues.newLinkedBlockingQueue(1).remainingCapacity());

  /** Returns the delay in nanoseconds until the next execution, or -1L to not reschedule. */
  abstract fun runOnce(): Long

  internal fun initQueue(queue: TaskQueue) {
    if (this.queue === queue) return

    check(this.queue === null) { "task is in multiple queues" }
    this.queue = queue
  }

  override fun toString(): String = name

  repeated PriorityLevelConfigurationCondition conditions = 1;
}

// QueuingConfiguration holds the configuration parameters for queuing
message QueuingConfiguration {
  // `queues` is the number of queues for this priority level. The
  // queues exist independently at each apiserver. The value must be
  // positive.  Setting it to 1 effectively precludes
  // shufflesharding and thus makes the distinguisher method of

  repeated PriorityLevelConfigurationCondition conditions = 1;
}

// QueuingConfiguration holds the configuration parameters for queuing
message QueuingConfiguration {
  // `queues` is the number of queues for this priority level. The
  // queues exist independently at each apiserver. The value must be
  // positive.  Setting it to 1 effectively precludes
  // shufflesharding and thus makes the distinguisher method of

import java.util.Queue;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Creates queues, containing sample elements, to be tested.
 *
 * @author Jared Levy
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public interface TestQueueGenerator<E extends @Nullable Object> extends TestCollectionGenerator<E> {
  @Override
  Queue<E> create(Object... elements);