Review

class SegmentInfos {
  /**
   * Returns a new SegmentInfos containing the SegmentInfo
   * instances in the specified range first (inclusive) to
   * last (exclusive), so total number of segments returned
   * is last-first.
   */
  public SegmentInfos range(int first, int last) {
    SegmentInfos infos = new SegmentInfos();
    infos.addAll(super.subList(first, last));
    return infos;
  }

}