*/
  public static ListeningScheduledExecutorService noOpScheduledExecutor() {
    return new NoOpScheduledExecutorService();
  }

  /**
   * Creates a scheduled executor service that runs each task in the thread that invokes {@code
   * execute/submit/schedule}, as in {@link CallerRunsPolicy}. This applies both to individually

    assertEquals(1, service.startUpCalled);
    assertEquals(Service.State.FAILED, service.state());
    assertThat(service.transitionStates).containsExactly(Service.State.STARTING);
  }

  public void testStop_withoutStart() {
    TestService service = new TestService();
    service.stopAsync().awaitTerminated();
    assertEquals(0, service.startUpCalled);
    assertEquals(0, service.shutDownCalled);

  public void testEnqueueAndDispatch_multithreaded() throws InterruptedException {
    Object listener = new Object();
    ExecutorService service = Executors.newFixedThreadPool(4);
    ListenerCallQueue<Object> queue = new ListenerCallQueue<>();
    try {
      queue.addListener(listener, service);

      final CountDownLatch latch = new CountDownLatch(1);
      Multiset<Object> counters = ConcurrentHashMultiset.create();

 * {@code ExecutorService}. Most users should call {@link ListeningExecutorService#submit(Callable)
 * ListeningExecutorService.submit} on a service obtained from {@link
 * MoreExecutors#listeningDecorator}.
 *
 * @author Sven Mawson
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault

@ElementTypesAreNonnullByDefault
public class AtomicDouble extends Number implements java.io.Serializable {
  private static final long serialVersionUID = 0L;

  // We would use AtomicLongFieldUpdater, but it has issues on some Android devices.
  private transient AtomicLong value;

  /**
   * Creates a new {@code AtomicDouble} with the given initial value.
   *
   * @param initialValue the initial value
   */

   *         .addNode(REYKJAVIK)
   *         .build();
   * }</pre>
   *
   * <p>Builder instances can be reused; it is safe to call {@link #build} multiple times to build
   * multiple graphs in series. Each new graph contains all the elements of the ones created before
   * it.
   *
   * @since 28.0
   */
  public static class Builder<N, V> {

    private final MutableValueGraph<N, V> mutableValueGraph;

import java.util.concurrent.Callable;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A listening executor service which forwards all its method calls to another listening executor
 * service. Subclasses should override one or more methods to modify the behavior of the backing
 * executor service as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *