class PageRange implements PagesSelection {

    @Override
    public SortedSet<Integer> getPages(int totalNumberOfPage) {
        SortedSet<Integer> retSet = new TreeSet<Integer>();
        for (int i = start; i <= totalNumberOfPage && i <= end; i++) {
            retSet.add(i);
        }
        return retSet;
    }

      PageRange();
    public  PageRange(int start, int end);
    public  PageRange(int start);

}