* for insertions.
   */
  static <E extends @Nullable Object> Set<E> preservesInsertionOrderOnAddsSet() {
    return CompactHashSet.create();
  }

  /**
   * Returns a new array of the given length with the same type as a reference array.
   *
   * @param reference any array of the desired type
   * @param length the length of the new array
   */
  /*

  }

  /**
   * Returns an immutable set instance containing the given enum elements. Internally, the returned
   * set will be backed by an {@link EnumSet}.
   *
   * <p>The iteration order of the returned set follows the enum's iteration order, not the order in
   * which the elements appear in the given collection.
   *

  /** Returns the file holding the data (possibly null). */
  @VisibleForTesting
  @CheckForNull
  synchronized File getFile() {
    return file;
  }

  /**
   * Creates a new instance that uses the given file threshold, and does not reset the data when the
   * {@link ByteSource} returned by {@link #asByteSource} is finalized.
   *
   * @param fileThreshold the number of bytes before the stream should switch to buffering to a file

  /**
   * Returns the elements of {@code unfiltered} that satisfy a predicate. The returned collection is
   * a live view of {@code unfiltered}; changes to one affect the other.
   *
   * <p>The resulting collection's iterator does not support {@code remove()}, but all other
   * collection methods are supported. When given an element that doesn't satisfy the predicate, the
   * collection's {@code add()} and {@code addAll()} methods throw an {@link

  /**
   * Returns the elements of {@code unfiltered} that satisfy a predicate. The returned collection is
   * a live view of {@code unfiltered}; changes to one affect the other.
   *
   * <p>The resulting collection's iterator does not support {@code remove()}, but all other
   * collection methods are supported. When given an element that doesn't satisfy the predicate, the
   * collection's {@code add()} and {@code addAll()} methods throw an {@link

     * Sets the value of the given {@code entry} in the given {@code segment} to be the given {@code
     * value}
     */
    void setValue(S segment, E entry, V value);
  }

  /**
   * An entry in a hash table of a {@link Segment}.
   *
   * <p>Entries in the map can be in the following states:
   *
   * <p>Valid: - Live: valid key/value are set
   *

      }
    };
  }

  /**
   * Returns an immutable map instance containing the given entries. Internally, the returned map
   * will be backed by an {@link EnumMap}.
   *
   * <p>The iteration order of the returned map follows the enum's iteration order, not the order in
   * which the elements appear in the given map.
   *
   * @param map the map to make an immutable copy of

    }
  }

  /**
   * Waits up to LONG_DELAY_MS for the given thread to enter a wait state: BLOCKED, WAITING, or
   * TIMED_WAITING.
   */
  void waitForThreadToEnterWaitState(Thread thread) {
    waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
  }

  /**
   * Returns the number of milliseconds since time given by startNanoTime, which must have been

   * multiset is a live view of {@code unfiltered}; changes to one affect the other.
   *
   * <p>The resulting multiset's iterators, and those of its {@code entrySet()} and {@code
   * elementSet()}, do not support {@code remove()}. However, all other multiset methods supported
   * by {@code unfiltered} are supported by the returned multiset. When given an element that

    }
  }

  /**
   * Waits up to LONG_DELAY_MS for the given thread to enter a wait state: BLOCKED, WAITING, or
   * TIMED_WAITING.
   */
  void waitForThreadToEnterWaitState(Thread thread) {
    waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
  }

  /**
   * Returns the number of milliseconds since time given by startNanoTime, which must have been