// nothing to do
}
else if (featureValue1 != null || featureValue2 != null) {
// the unrelated values are put in uppercase
String f1 = featureValue1 == null ? "null" : featureValue1.toUpperCase();
String f2 = featureValue2 == null ? "null" : featureValue2.toUpperCase();
a1.setFeatureValueFromString(eachFeature1, f1);
a2.setFeatureValueFromString(eachFeature2, f2);
return false;
}
else if (featureValue2.trim().toLowerCase().contains(featureValue1.trim().toLowerCase())) {