E head = oldTable.get(oldIndex);

        if (head != null) {
          E next = head.getNext();
          int headIndex = head.getHash() & newMask;

          // Single node on list
          if (next == null) {
            newTable.set(headIndex, head);
          } else {
            // Reuse the consecutive sequence of nodes with the same target

   * the original {@code toKey}.
   *
   * @since 12.0
   */
  @Override
  public ImmutableSortedMap<K, V> headMap(K toKey, boolean inclusive) {
    return getSubMap(0, keySet.headIndex(checkNotNull(toKey), inclusive));
  }

  /**
   * This method returns a {@code ImmutableSortedMap}, consisting of the entries whose keys ranges
   * from {@code fromKey}, inclusive, to {@code toKey}, exclusive.

   * the original {@code toKey}.
   *
   * @since 12.0
   */
  @Override
  public ImmutableSortedMap<K, V> headMap(K toKey, boolean inclusive) {
    return getSubMap(0, keySet.headIndex(checkNotNull(toKey), inclusive));
  }

  /**
   * This method returns a {@code ImmutableSortedMap}, consisting of the entries whose keys ranges
   * from {@code fromKey}, inclusive, to {@code toKey}, exclusive.