@CollectionSize.Require(ONE)
  public void testValuesIteratorRemove() {
    Iterator<V> valuesItr = multimap().values().iterator();
    valuesItr.next();
    valuesItr.remove();
    assertTrue(multimap().isEmpty());
  }

        // Then
        assertNotNull(exception.getContext());
        assertTrue(exception.getContext().isEmpty());

        // Adding null context should be safe
        exception.withContext(null);
        assertTrue(exception.getContext().isEmpty());
    }

    @Test
    @DisplayName("Should be serializable")
    void testSerialization() throws Exception {
        // Given

      }
    }
    this.delegate = Collections.unmodifiableMap(delegate);
  }

  @Override
  boolean isPartialView() {
    return false;
  }

  @Override
  public final boolean isEmpty() {
    return delegate.isEmpty();
  }

  @Override
  public final boolean containsKey(@Nullable Object key) {
    return Maps.safeContainsKey(delegate, key);
  }

  @Override

   * chars are actually available for reading. This means that a source may return {@code true} from
   * {@code isEmpty()} despite having readable content.
   *
   * @throws IOException if an I/O error occurs
   * @since 15.0
   */
  public boolean isEmpty() throws IOException {
    Optional<Long> lengthIfKnown = lengthIfKnown();
    if (lengthIfKnown.isPresent()) {

public class MapClearTester<K, V> extends AbstractMapTester<K, V> {
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClear() {
    getMap().clear();
    assertTrue("After clear(), a map should be empty.", getMap().isEmpty());
    assertEquals(0, getMap().size());
    assertFalse(getMap().entrySet().iterator().hasNext());
  }

  @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_REMOVE})
  @CollectionSize.Require(SEVERAL)

    protected boolean canDetectActivation(Profile profile) {
        return profile.getActivation() != null
                && profile.getActivation().getJdk() != null
                && !profile.getActivation().getJdk().isEmpty();
    }

	S3 S3Location `xml:"S3,omitempty"`
}

// IsEmpty returns true if output location not specified.
func (o *OutputLocation) IsEmpty() bool {
	return o.S3.BucketName == ""
}

// SelectParameters specifies sql select parameters
type SelectParameters struct {
	s3select.S3Select
}

// IsEmpty returns true if no select parameters set
func (sp *SelectParameters) IsEmpty() bool {
	return sp == nil
}

            return Optional.of(Boolean.TRUE);
        }
        return Optional.empty();
    }

    @Override
    public Optional<List<String>> goals() {
        if (!commandLine.getArgList().isEmpty()) {
            return Optional.of(commandLine.getArgList());
        }
        return Optional.empty();
    }

    @Override
    public void displayHelp(ParserRequest request, Consumer<String> printStream) {

   */
  @CanIgnoreReturnValue
  public @Nullable E pollLast() {
    return isEmpty() ? null : removeAndGet(getMaxElementIndex());
  }

  /**
   * Removes and returns the greatest element of this queue.
   *
   * @throws NoSuchElementException if the queue is empty
   */
  @CanIgnoreReturnValue
  public E removeLast() {
    if (isEmpty()) {
      throw new NoSuchElementException();
    }

        List<Restriction> restrictions;

        if (r1.isEmpty() || r2.isEmpty()) {
            restrictions = Collections.emptyList();
        } else {
            restrictions = Collections.unmodifiableList(intersection(r1, r2));
        }

        ArtifactVersion version = null;
        if (!restrictions.isEmpty()) {
            for (Restriction r : restrictions) {