@Override
protected void print(RevFeature feature, Writer w) throws IOException {
ImmutableList<Optional<Object>> values = feature.getValues();
for (Optional<Object> opt : values) {
final FieldType type = FieldType.forValue(opt);
String valueString = TextValueSerializer.asString(opt);
println(w, type.toString() + "\t" + valueString);
}
w.flush();
}
