public PageRange addPageSequence(int startPageNumber,int endPageNumber){
  sequenceStarts.add(startPageNumber);
  sequenceEnds.add(endPageNumber);
  return this;
}

public PageRange addPageSequence ( int startPageNumber , int endPageNumber ) { sequenceStarts . add ( startPageNumber ) ; sequenceEnds . add ( endPageNumber ) ; return this ; }
adds a page sequence to the range .
