return false;
    }

    @Override
    public boolean isLeaf() {
        return true;
    }

    @Override
    public void setValue(Object value) {
        throw new UnsupportedOperationException();
    }

    static final PermittedMetaException UOE_OR_ISE =
        new PermittedMetaException("UnsupportedOperationException or IllegalStateException") {
          @Override
          boolean isPermitted(Exception exception) {
            return exception instanceof UnsupportedOperationException
                || exception instanceof IllegalStateException;
          }
        };

    Set<String> presentAsSet = Optional.of("a").asSet();
    assertThrows(UnsupportedOperationException.class, () -> presentAsSet.add("b"));
  }

  public void testAsSet_absentIsImmutable() {
    Set<Object> absentAsSet = Optional.absent().asSet();
    assertThrows(UnsupportedOperationException.class, () -> absentAsSet.add("foo"));
  }

  public void testTransform_absent() {

    }

    @Test
    @DisplayName("Should have correct dialect codes for SMB2+ versions")
    void testDialectCodes() {
        // SMB1 should throw UnsupportedOperationException
        assertThrows(UnsupportedOperationException.class, () -> {
            DialectVersion.SMB1.getDialect();
        });

        // SMB2+ versions should have valid dialect codes

          .put(TimeoutException.class, e -> e instanceof TimeoutException)
          .put(UnsupportedCharsetException.class, e -> e instanceof UnsupportedCharsetException)
          .put(UnsupportedOperationException.class, e -> e instanceof UnsupportedOperationException)
          .put(VerifyException.class, e -> e instanceof VerifyException)
          .putAll(PlatformSpecificExceptionBatch.PLATFORM.exceptions())
          .buildOrThrow();

    Iterable<String> iterable = MinimalIterable.from(singleton("a"));
    Iterator<String> iterator = iterable.iterator();
    assertTrue(iterator.hasNext());
    assertEquals("a", iterator.next());
    assertThrows(UnsupportedOperationException.class, () -> iterator.remove());
    assertFalse(iterator.hasNext());
    assertThrows(NoSuchElementException.class, () -> iterator.next());
    assertThrows(IllegalStateException.class, () -> iterable.iterator());
  }

    return type;
  }

  /**
   * Returns the {@link Comparator} used.
   *
   * @throws UnsupportedOperationException if comparator is not defined
   */
  public Comparator<T> comparator() {
    if (comparator != null) {
      return comparator;
    }
    throw new UnsupportedOperationException("This ordering does not define a comparator.");
  }

  @Override

    return type;
  }

  /**
   * Returns the {@link Comparator} used.
   *
   * @throws UnsupportedOperationException if comparator is not defined
   */
  public Comparator<T> comparator() {
    if (comparator != null) {
      return comparator;
    }
    throw new UnsupportedOperationException("This ordering does not define a comparator.");
  }

  @Override

    public void close() throws CIFSException {
        if (this.next != null) {
            doClose();
        }
    }

    @Override
    public void remove() {
        throw new UnsupportedOperationException("remove");
    }

  AbstractImmutableBiMapMapInterfaceTest() {
    super(false, false, false, false, false);
  }

  @Override
  protected Map<K, V> makeEmptyMap() {
    throw new UnsupportedOperationException();
  }

  private static final Joiner JOINER = Joiner.on(", ");

  @Override
  protected final void assertMoreInvariants(Map<K, V> map) {
    BiMap<K, V> bimap = (BiMap<K, V>) map;