abstract ImmutableSortedSet<E> tailSetImpl(E fromElement, boolean inclusive);

  /** @since 12.0 */
  @GwtIncompatible // NavigableSet
  @Override
  @CheckForNull
  public E lower(E e) {
    return Iterators.<@Nullable E>getNext(headSet(e, false).descendingIterator(), null);
  }

  /** @since 12.0 */
  @Override
  @CheckForNull
  public E floor(E e) {

   * @return an immutable {@link Collection} containing all the different permutations of the
   *     original iterable.
   * @throws NullPointerException if the specified iterable is null or has any null elements.
   * @since 12.0
   */
  public static <E extends Comparable<? super E>> Collection<List<E>> orderedPermutations(
      Iterable<E> elements) {
    return orderedPermutations(elements, Ordering.natural());
  }

  /**

 * "https://github.com/google/guava/wiki/ImmutableCollectionsExplained">immutable collections</a>.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 * @since 2.0 (implements {@code NavigableMap} since 12.0)
 */
@GwtCompatible(serializable = true, emulated = true)
@ElementTypesAreNonnullByDefault
public final class ImmutableSortedMap<K, V> extends ImmutableMap<K, V>
    implements NavigableMap<K, V> {
  /**

  }

  public void testMurmur3_128() {
    HashTestUtils.check2BitAvalanche(Hashing.murmur3_128(), 250, 0.20);
    HashTestUtils.checkAvalanche(Hashing.murmur3_128(), 250, 0.17);
    HashTestUtils.checkNo2BitCharacteristics(Hashing.murmur3_128());
    HashTestUtils.checkNoFunnels(Hashing.murmur3_128());
    HashTestUtils.assertInvariants(Hashing.murmur3_128());
    assertEquals("Hashing.murmur3_128(0)", Hashing.murmur3_128().toString());
  }

 * "https://github.com/google/guava/wiki/ImmutableCollectionsExplained">immutable collections</a>.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 * @since 2.0 (implements {@code NavigableMap} since 12.0)
 */
@GwtCompatible(serializable = true, emulated = true)
@ElementTypesAreNonnullByDefault
public final class ImmutableSortedMap<K, V> extends ImmutableMap<K, V>
    implements NavigableMap<K, V> {
  /**

   *
   * <p>This method does not create any memory pressure as would be required to cause soft
   * references to be processed.
   *
   * @throws RuntimeException if timed out or interrupted while waiting
   * @since 12.0
   */
  @SuppressWarnings("removal") // b/260137033
  public static void awaitFullGc() {
    CountDownLatch finalizerRan = new CountDownLatch(1);
    WeakReference<Object> ref =
        new WeakReference<>(

     * value. The order of calling this method, relative to the {@code add()}/{@code addValue()}
     * methods, is not significant.
     *
     * @since 18.0 (since 12.0 as {@code Objects.ToStringHelper.omitNullValues()}).
     */
    @CanIgnoreReturnValue
    public ToStringHelper omitNullValues() {
      omitNullValues = true;
      return this;
    }

    /**

   * throws an exception, whereas the Java 8+ method returns {@code Optional.absent()}.
   *
   * @throws NullPointerException if the function returns {@code null}
   * @since 12.0
   */
  public abstract <V> Optional<V> transform(Function<? super T, V> function);

  /**
   * Returns {@code true} if {@code object} is an {@code Optional} instance, and either the

   *
   * <p><b>Note:</b> if you need an immutable empty {@link List}, use {@link Collections#emptyList}
   * instead.
   *
   * @return a new, empty {@code CopyOnWriteArrayList}
   * @since 12.0
   */
  @J2ktIncompatible
  @GwtIncompatible // CopyOnWriteArrayList
  public static <E extends @Nullable Object> CopyOnWriteArrayList<E> newCopyOnWriteArrayList() {
    return new CopyOnWriteArrayList<>();
  }

  static final double MEGA_STREAM_MEAN = MEGA_STREAM_MAX / 2;
  static final double MEGA_STREAM_POPULATION_VARIANCE =
      (MEGA_STREAM_COUNT - 1) * (MEGA_STREAM_COUNT + 1) / 12.0;

  // Stats instances:

  static final Stats EMPTY_STATS_VARARGS = Stats.of();
  static final Stats EMPTY_STATS_ITERABLE = Stats.of(ImmutableList.<Double>of());