*/
    @Override
    public ActionResponse godHandPrologue(final ActionRuntime runtime) {
        if (!isAccessAllowed()) {
            return asJson(new ApiErrorResponse().message(getMessage(messages -> messages.addErrorsUnauthorizedRequest(GLOBAL)))
                    .status(Status.UNAUTHORIZED)
                    .result());
        }

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

    private GroupDbm() {
    }

    public static GroupDbm getInstance() {
        return _instance;
    }

    // ===================================================================================

  private static final class TestTable<R, C, V> implements Table<R, C, V>, Serializable {
    private final Table<R, C, V> delegate = HashBasedTable.create();
    private final Object mutex = new Object[0]; // something Serializable

    @Override
    public String toString() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.toString();
    }

    @Override

     */
    protected final SmbAuthException getRequestingException() {
        return this.sae;
    }

    /**
     * Used internally by jCIFS when an <code>SmbAuthException</code> is trapped to retrieve new user credentials.
     *
     * @param url the URL that requires authentication
     * @param sae the authentication exception that was thrown
     * @return credentials returned by prompt
     */

        if (args == null || args.length == 0) {
            return "";
        }
        final StringBuilder buffer = new StringBuilder();
        for (final Object arg : args) {
            buffer.append(arg + ", ");
        }
        buffer.setLength(buffer.length() - ", ".length());
        return new String(buffer);
    }

    /**
     * Initializes the class.
     */

implements Toolchain, ToolchainPrivate {
    private final Logger logger;

    private String type;

    private Map<String, RequirementMatcher> provides = new HashMap<>();

    public static final String KEY_TYPE = "type"; // NOI18N

    private ToolchainModel model;

    /**
     *
     * @param model the model, must not be {@code null}

     */
    boolean accept(@Nonnull NodeVisitor visitor);

    /**
     * Returns a new tree starting at this node, filtering the children.
     * Note that this node will not be filtered and only the children
     * and its descendant will be checked.
     *
     * @param filter the filter to apply
     * @return a new filtered graph
     */
    @Nonnull
    Node filter(@Nonnull Predicate<Node> filter);

    /**

    List<E> descending = new ArrayList<>();
    for (Iterator<E> i = navigableSet.descendingIterator(); i.hasNext(); ) {
      descending.add(i.next());
    }
    Collections.reverse(descending);
    assertEquals(values, descending);
  }

  public void testEmptySubSet() {
    NavigableSet<E> empty = navigableSet.subSet(e0(), false, e0(), false);
    assertEquals(new TreeSet<E>(), empty);
  }

  /*

    // an immutable list, which would change the behavior of this method
    return readLines(
        url,
        charset,
        new LineProcessor<List<String>>() {
          final List<String> result = new ArrayList<>();

          @Override
          public boolean processLine(String line) {
            result.add(line);
            return true;
          }

   */
  private static char[] growBuffer(char[] dest, int index, int size) {
    if (size < 0) { // overflow - should be OutOfMemoryError but GWT/j2cl don't support it
      throw new AssertionError("Cannot increase internal buffer any further");
    }
    char[] copy = new char[size];
    if (index > 0) {
      System.arraycopy(dest, 0, copy, 0, index);
    }
    return copy;
  }