try {
      b0 = source.readByte() and 0xff
    } finally {
      source.timeout().timeout(timeoutBefore, TimeUnit.NANOSECONDS)
    }

    opcode = b0 and B0_MASK_OPCODE
    isFinalFrame = b0 and B0_FLAG_FIN != 0
    isControlFrame = b0 and OPCODE_FLAG_CONTROL != 0

    // Control frames must be final frames (cannot contain continuations).
    if (isControlFrame && !isFinalFrame) {

      barrier.await(1, SECONDS);
    } finally {
      service.shutdown();
    }
  }

  public void testRejectedExecutionThrownWithMultipleCalls() throws Exception {
    final CountDownLatch latch = new CountDownLatch(1);
    final SettableFuture<?> future = SettableFuture.create();
    final Executor delegate =
        new Executor() {
          @Override

     */

    @Override
    public void close () throws IOException {
        try {
            if ( this.handle.isValid() ) {
                this.handle.close();
            }
        }
        finally {
            this.file.clearAttributeCache();
            this.tmp = null;
        }
    }


    /**
     * Writes the specified byte to this file output stream.
     *

 */
public class NtlmHttpURLConnection extends HttpURLConnection {

    private static final int MAX_REDIRECTS =
            Integer.parseInt(System.getProperty("http.maxRedirects", "20"));

    private static final int LM_COMPATIBILITY =
            Config.getInt("jcifs.smb1.smb.lmCompatibility", 0);

    private static final String DEFAULT_DOMAIN;

    private HttpURLConnection connection;

            final StatObjectResponse statObject = getStatObject(bucketName, path);
            if (statObject == null) {
                final Set<RequestData> requestDataSet = new HashSet<>();
                final ListObjectsArgs args = ListObjectsArgs.builder().bucket(bucketName).prefix(path).recursive(false)
                        .includeUserMetadata(false).useApiVersion1(false).build();

    }

    private void disableOnPresentOption(
            final CommandLine commandLine, final String option, final Consumer<Boolean> setting) {
        if (commandLine.hasOption(option)) {
            setting.accept(false);
        }
    }

    private void disableOnPresentOption(
            final CommandLine commandLine, final char option, final Consumer<Boolean> setting) {

    }

    public boolean updateDocument(final SearchEngineClient searchEngineClient, final String id, final String field, final Object value) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return searchEngineClient.update(fessConfig.getIndexDocumentUpdateIndex(), id, field, value);
    }

    public boolean deleteDocument(final SearchEngineClient searchEngineClient, final String id) {

        try {
            final InputStream is = request.getInputStream();
            try {
                final byte[] buf = new byte[1024];
                while ((is.read(buf)) != -1) {}
            } catch (final Exception ignored) {} finally {
                try {
                    is.close();
                } catch (final Exception ignored) {}
            }

        }
        return OptionalEntity.empty();
    }

    public static OptionalEntity<ElevateWord> getElevateWord(final CreateForm form) {
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final String username = systemHelper.getUsername();
        final long currentTime = systemHelper.getCurrentTimeAsLong();

        return getEntity(form, username, currentTime).map(entity -> {

 */
@ElementTypesAreNonnullByDefault
@J2ktIncompatible
public final class ExecutionSequencer {

  private ExecutionSequencer() {}

  /** Creates a new instance. */
  public static ExecutionSequencer create() {
    return new ExecutionSequencer();
  }

  /** This reference acts as a pointer tracking the head of a linked list of ListenableFutures. */
  private final AtomicReference<ListenableFuture<@Nullable Void>> ref =