return null;
final ArrayList<Double> refQuals = new ArrayList<>();
final ArrayList<Double> altQuals = new ArrayList<>();
for ( final Genotype genotype : genotypes.iterateInSampleNameOrder() ) {
boolean usePileup = true;
if ( stratifiedPerReadAlleleLikelihoodMap != null ) {
final PerReadAlleleLikelihoodMap likelihoodMap = stratifiedPerReadAlleleLikelihoodMap.get(genotype.getSampleName());