//                                                                           Singleton
    //                                                                           =========
    private static final FailureUrlDbm _instance = new FailureUrlDbm();

    private FailureUrlDbm() {
    }

    public static FailureUrlDbm getInstance() {
        return _instance;
    }

@GwtIncompatible
@J2ktIncompatible
@ElementTypesAreNonnullByDefault
public abstract class AbstractExecutionThreadService implements Service {
  /* use AbstractService for state management */
  private final Service delegate =
      new AbstractService() {
        @Override
        protected final void doStart() {
          Executor executor = MoreExecutors.renamingDecorator(executor(), () -> serviceName());
          executor.execute(
              () -> {

     */
    @Nonnull
    Optional<Boolean> help();

    /**
     * Returns a new instance of {@link Options} with values interpolated using the given properties.
     *
     * @param properties a collection of property maps to use for interpolation
     * @return a new {@link Options} instance with interpolated values
     */
    @Nonnull

    private final SmbResourceLocatorImpl resourceLoc;
    private final SmbTreeConnection treeConnection;

    private final AtomicLong usageCount = new AtomicLong(1);


    /**
     * @param resourceLoc
     * @param treeConnection
     */
    public SmbTreeHandleImpl ( SmbResourceLocatorImpl resourceLoc, SmbTreeConnection treeConnection ) {

        this.flags = buf[ bi++ ] & 0xFF;
        int size = SMBUtil.readInt2(buf, bi);
        bi += 2;
        this.access = SMBUtil.readInt4(buf, bi);
        bi += 4;
        this.sid = new SID(buf, bi);
        return size;
    }


    void appendCol ( StringBuffer sb, String str, int width ) {
        sb.append(str);
        int count = width - str.length();

    @Override
    public int invoke(ForkedMavenInvokerRequest invokerRequest) throws InvokerException {
        requireNonNull(invokerRequest);
        validate(invokerRequest);

        ArrayList<String> cmdAndArguments = new ArrayList<>();
        cmdAndArguments.add(invokerRequest
                .installationDirectory()
                .resolve("bin")
                .resolve(
                        Os.IS_WINDOWS

	acceptCh    chan acceptResult // channel where all TCP listeners write accepted connection.
	ctx         context.Context
	ctxCanceler context.CancelFunc
}

// start - starts separate goroutine for each TCP listener.  A valid new connection is passed to httpListener.acceptCh.
func (listener *httpListener) start() {
	// Closure to send acceptResult to acceptCh.
	// It returns true if the result is sent else false if returns when doneCh is closed.

      ListenableFuture<I> input,
      AsyncFunction<? super I, ? extends O> function,
      Executor executor) {
    checkNotNull(executor);
    AsyncTransformFuture<I, O> output = new AsyncTransformFuture<>(input, function);
    input.addListener(output, rejectionPropagatingExecutor(executor, output));
    return output;
  }

    private static OptionalEntity<User> getEntity(final CreateForm form) {
        switch (form.crudMode) {
        case CrudMode.CREATE:
            return OptionalEntity.of(new User()).map(entity -> {
                entity.setId(Base64.getUrlEncoder().encodeToString(form.name.getBytes(Constants.CHARSET_UTF_8)));
                return entity;
            });
        case CrudMode.EDIT:

            fail();
        });
    }

    /*
    @Test
    public void test_Get_ssl() throws Exception {
        final String filename = "config/certs/http_ca.crt";
        try (InputStream in = new FileInputStream(filename)) {
            Certificate certificate = CertificateFactory.getInstance("X.509").generateCertificate(in);

            KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());