notEmpty =
        new Monitor.Guard(monitor) {
          @Override
          public boolean isSatisfied() {
            return count > 0;
          }
        };
    notFull =
        new Monitor.Guard(monitor) {
          @Override
          public boolean isSatisfied() {
            return count < items.length;
          }
        };
  }

  /**

    * EBS on AWS, and Cinder on OpenStack). In previous versions of Kubernetes
    * a PersistentVolumeClaim without a StorageClass annotation on these cloud
    * platforms would be satisfied by manually-created PersistentVolume objects.
    * Administrators can choose to disable this behavior by deleting the automatically
    * installed StorageClass API object. Alternatively, administrators may choose to

      AwaitHealthGuard() {
        super(ServiceManagerState.this.monitor);
      }

      @Override
      @GuardedBy("ServiceManagerState.this.monitor")
      public boolean isSatisfied() {
        // All services have started or some service has terminated/failed.
        return states.count(RUNNING) == numberOfServices
            || states.contains(STOPPING)
            || states.contains(TERMINATED)

      AwaitHealthGuard() {
        super(ServiceManagerState.this.monitor);
      }

      @Override
      @GuardedBy("ServiceManagerState.this.monitor")
      public boolean isSatisfied() {
        // All services have started or some service has terminated/failed.
        return states.count(RUNNING) == numberOfServices
            || states.contains(STOPPING)
            || states.contains(TERMINATED)

	Walk(ctx context.Context, bucket, prefix string, results chan<- itemOrErr[ObjectInfo], opts WalkOptions) error

	// Object operations.

	// GetObjectNInfo returns a GetObjectReader that satisfies the
	// ReadCloser interface. The Close method runs any cleanup
	// functions, so it must always be called after reading till EOF
	//
	// IMPORTANTLY, when implementations return err != nil, this

 * <p>There are three primary interfaces provided to represent graphs. In order of increasing
 * complexity they are: {@link Graph}, {@link ValueGraph}, and {@link Network}. You should generally
 * prefer the simplest interface that satisfies your use case. See the <a
 * href="https://github.com/google/guava/wiki/GraphsExplained#choosing-the-right-graph-type">
 * "Choosing the right graph type"</a> section of the Guava User Guide for more details.
 *

 * <p>There are three primary interfaces provided to represent graphs. In order of increasing
 * complexity they are: {@link Graph}, {@link ValueGraph}, and {@link Network}. You should generally
 * prefer the simplest interface that satisfies your use case. See the <a
 * href="https://github.com/google/guava/wiki/GraphsExplained#choosing-the-right-graph-type">
 * "Choosing the right graph type"</a> section of the Guava User Guide for more details.
 *

 * <p>There are three primary interfaces provided to represent graphs. In order of increasing
 * complexity they are: {@link Graph}, {@link ValueGraph}, and {@link Network}. You should generally
 * prefer the simplest interface that satisfies your use case. See the <a
 * href="https://github.com/google/guava/wiki/GraphsExplained#choosing-the-right-graph-type">
 * "Choosing the right graph type"</a> section of the Guava User Guide for more details.
 *

   * @throws IllegalArgumentException if {@code occurrences} is negative
   */
  /*
   * TODO(cpovirk): remove and removeExactly currently accept null inputs only
   * if occurrences == 0. This satisfies both NullPointerTester and
   * CollectionRemoveTester.testRemove_nullAllowed, but it's not clear that it's
   * a good policy, especially because, in order for the test to pass, the

  final PriorityQueue<E> q;
  final Monitor monitor = new Monitor(true);
  private final Monitor.Guard notEmpty =
      new Monitor.Guard(monitor) {
        @Override
        public boolean isSatisfied() {
          return !q.isEmpty();
        }
      };

  /**
   * Creates a {@code MonitorBasedPriorityBlockingQueue} with the default initial capacity (11) that