}

  private Absent() {}

  @Override
  public boolean isPresent() {
    return false;
  }

  @Override
  public T get() {
    throw new IllegalStateException("Optional.get() cannot be called on an absent value");
  }

  @Override
  public T or(T defaultValue) {
    return checkNotNull(defaultValue, "use Optional.orNull() instead of Optional.or(null)");
  }

    return forward.iterator();
  }

  @Override
  @GwtIncompatible // NavigableSet
  ImmutableSortedSet<E> createDescendingSet() {
    throw new AssertionError("should never be called");
  }

  @Override
  public @Nullable E lower(E element) {
    return forward.higher(element);
  }

  @Override
  public @Nullable E floor(E element) {
    return forward.ceiling(element);
  }

  virtual absl::Status InitializeLocalOnlyContext(const ServerDef& server_def,
                                                  int keep_alive_secs) = 0;

  // Set up a multi-client distributed execution environment. Must be called
  // on all tasks in the cluster. This call internally coordinates with other
  // tasks to initialize the eager context and TF server for multi-client
  // execution.

/**
 * Creator for protected words dictionary files.
 * This class manages the creation and registration of protected words dictionary files.
 */
public class ProtwordsCreator extends DictionaryCreator {
    private static final Logger logger = LogManager.getLogger(ProtwordsCreator.class);

    /**
     * Constructor for ProtwordsCreator.
     * Initializes the creator with a pattern to match protwords files.
     */
    public ProtwordsCreator() {

                final long count = b.process();
                resultBuf.append(b.getClass().getSimpleName()).append(" : ").append(count).append('\n');
            } catch (final Exception e) {
                logger.warn("Failed to update scores: booster={}", b.getClass().getSimpleName(), e);
                resultBuf.append(e.getMessage()).append('\n');
            }
        });
        return resultBuf.toString();
    }

    /**

 *     Guava 27.0
 */
public final class InternalFutures {
  /**
   * Usually returns {@code null} but, if the given {@code Future} has failed, may <i>optionally</i>
   * return the cause of the failure. "Failure" means specifically "completed with an exception"; it
   * does not include "was cancelled." To be explicit: If this method returns a non-null value,
   * then:

	notificationEventsErrorsTotalMD     = NewCounterMD(notificationEventsErrorsTotal, "Events that were failed to be sent to the targets")
	notificationEventsSentTotalMD       = NewCounterMD(notificationEventsSentTotal, "Total number of events sent to the targets")

        bool((must, should, mustNot, filter) -> {
            filteredLambda.callback(must, filter);
        }, opLambda);
    }

    public void not(OperatorCall<GroupCQ> notLambda) {
        not(notLambda, null);
    }

    public void not(final OperatorCall<GroupCQ> notLambda, final ConditionOptionCall<BoolQueryBuilder> opLambda) {
        bool((must, should, mustNot, filter) -> notLambda.callback(mustNot), opLambda);
    }

                             * augment the addresses name's hashCode to distinguish those resolved by
                             * Lmhosts, WINS, or BCAST. Otherwise a failed query from say WINS would
                             * get pulled out of the cache for a BCAST on the same name.
                             */
                            response.addrEntry[0].hostName.srcHashCode = request.addr.hashCode();

            // Act
            SmbFile[] files = smbFile.listFiles(filter);

            // Assert
            assertNotNull(files);
            assertEquals(0, files.length);
        }

        @Test
        void testListFilesOnNonDirectory() throws SmbException {
            // Arrange
            doReturn(false).when(smbFile).isDirectory();