public static VariantContext purgeUnallowedGenotypeAttributes(
VariantContext vc, Set<String> allowedAttributes) {
if (allowedAttributes == null) return vc;
GenotypesContext newGenotypes = GenotypesContext.create(vc.getNSamples());
for (final Genotype genotype : vc.getGenotypes()) {
Map<String, Object> attrs = new HashMap<String, Object>();
for (Map.Entry<String, Object> attr : genotype.getAttributes().entrySet()) {
if (allowedAttributes.contains(attr.getKey())) attrs.put(attr.getKey(), attr.getValue());
}
newGenotypes.add(Genotype.modifyAttributes(genotype, attrs));
}
return new VariantContextBuilder(vc).genotypes(newGenotypes).make();
}
