private Set<String> calculateAddedFeatures(FeatureModel oldModel, FeatureModel newModel) {
Set<String> addedFeatures = new HashSet<String>();
for (Feature feature : newModel.getFeatures())
if (feature.isConcrete()) {
String name = newModel.getRenamingsManager().getOldName(feature.getName());
Feature associatedFeature =
oldModel.getFeature(oldModel.getRenamingsManager().getNewName(name));
if (associatedFeature == null || associatedFeature.isAbstract()) addedFeatures.add(name);
}
return addedFeatures;
}
