private static final class UnsafeAtomicHelper extends AtomicHelper {
    static final sun.misc.Unsafe UNSAFE;
    static final long LISTENERS_OFFSET;
    static final long WAITERS_OFFSET;
    static final long VALUE_OFFSET;
    static final long WAITER_THREAD_OFFSET;
    static final long WAITER_NEXT_OFFSET;

    static {
      sun.misc.Unsafe unsafe = null;
      try {

      checkMaximumSize(4, 8, maxSize);
      checkMaximumSize(8, 8, maxSize);
    }

    checkMaximumSize(1, 8, Long.MAX_VALUE);
    checkMaximumSize(2, 8, Long.MAX_VALUE);
    checkMaximumSize(4, 8, Long.MAX_VALUE);
    checkMaximumSize(8, 8, Long.MAX_VALUE);

    // vary initial capacity wrt maximumSize

    for (int capacity = 0; capacity < 8; capacity++) {

      checkMaximumSize(4, 8, maxSize);
      checkMaximumSize(8, 8, maxSize);
    }

    checkMaximumSize(1, 8, Long.MAX_VALUE);
    checkMaximumSize(2, 8, Long.MAX_VALUE);
    checkMaximumSize(4, 8, Long.MAX_VALUE);
    checkMaximumSize(8, 8, Long.MAX_VALUE);

    // vary initial capacity wrt maximumSize

    for (int capacity = 0; capacity < 8; capacity++) {

  ObjectCountHashMap<E> newBackingMap(int distinctElements) {
    return new ObjectCountHashMap<>(distinctElements);
  }

  @GwtIncompatible // Not needed in emulated source.
  @J2ktIncompatible
  private static final long serialVersionUID = 0;

    }

    Object readResolve() {
      // EJ2 #76: Write readObject() methods defensively.
      return new ImmutableEnumSet<E>(delegate.clone());
    }

    private static final long serialVersionUID = 0;
  }

    }

    private static final long serialVersionUID = 0;
  }

  Object writeReplace() {
    return new SerializedForm<>(asMapOfRanges());
  }

  @J2ktIncompatible // java.io.ObjectInputStream
  private void readObject(ObjectInputStream stream) throws InvalidObjectException {
    throw new InvalidObjectException("Use SerializedForm");
  }

  private static final long serialVersionUID = 0;

      }
    }

    private static final long serialVersionUID = 0;
  }

  private static final class UnknownElementException extends RuntimeException {
    private UnknownElementException(Collection<?> expected, Object actual) {
      super("Returned value '" + actual + "' not found. Remaining elements: " + expected);
    }

    private static final long serialVersionUID = 0;
  }

  /**

    setMap(map);
    Serialization.populateMultimap(this, stream, distinctKeys);
  }

  @GwtIncompatible // Not needed in emulated source.
  @J2ktIncompatible
  private static final long serialVersionUID = 0;

    SerializedForm(Object[] elements) {
      this.elements = elements;
    }

    Object readResolve() {
      return copyOf(elements);
    }

    private static final long serialVersionUID = 0;
  }

  @Override
  @J2ktIncompatible // serialization
  Object writeReplace() {
    return new SerializedForm(toArray());
  }

  @J2ktIncompatible // serialization

      checkNotNull(target);
      checkPositionIndexes(off, off + len, bytes.length);
      checkArgument(len <= alphabet.bytesPerChunk);
      long bitBuffer = 0;
      for (int i = 0; i < len; ++i) {
        bitBuffer |= bytes[off + i] & 0xFF;
        bitBuffer <<= 8; // Add additional zero byte in the end.
      }