code: @Override
  		public int compare(CDSSequence o1, CDSSequence o2) {
  			if(o1.getStrand() != o2.getStrand()){
  				return o1.getBioBegin() - o2.getBioBegin();
  			}
  			if(o1.getStrand() == Strand.NEGATIVE){
  				return -1 * (o1.getBioBegin() - o2.getBioBegin());
  			}
  
  			return o1.getBioBegin() - o2.getBioBegin();
  		}
docs: Used to sort two CDSSequences where Negative Strand makes it tough
  @param o1
  @param o2
  @return val