code: public static ChromPos getChromosomePosForCDScoordinate(int cdsNucleotidePosition, GeneChromosomePosition chromPos) {
  
  		logger.debug(" ? Checking chromosome position for CDS position " + cdsNucleotidePosition);
  
  		List<Integer> exonStarts = chromPos.getExonStarts();
  		List<Integer> exonEnds = chromPos.getExonEnds();
  
  		logger.debug(" Exons:" + exonStarts.size());
  
  		int cdsStart = chromPos.getCdsStart();
  		int cdsEnd = chromPos.getCdsEnd();
  
  
  		ChromPos chromosomePos = null;
  
  		if (chromPos.getOrientation().equals('+'))
  
  			chromosomePos = ChromosomeMappingTools.getChromPosForward(cdsNucleotidePosition, exonStarts, exonEnds, cdsStart, cdsEnd);
  		else
  			chromosomePos = ChromosomeMappingTools.getChromPosReverse(cdsNucleotidePosition, exonStarts, exonEnds, cdsStart, cdsEnd);
  
  		logger.debug("=> CDS pos " + cdsNucleotidePosition + " for " + chromPos.getGeneName() + " is on chromosome at  " + chromosomePos);
  		return chromosomePos;
  
  	}
docs: Maps the position of a CDS nucleotide back to the genome
  
  @param cdsNucleotidePosition
  @return a ChromPos object