mx.setProperty("http://xmlpull.org/v1/doc/properties.html#serializer-line-separator", "\n");
final String encoding = "UTF-8";
mx.setOutput(buffer, encoding);
mx.startDocument(encoding, null);
if (hack != null) {
mx.processingInstruction(hack);
}
metadata.writeToSerializer(null, mx);
mx.flush();
}