@Test
public void test_HighSurrogateAttPairDecimal() throws JDOMException, IOException, XMLStreamException {
SAXBuilder builder = new SAXBuilder();
builder.setExpandEntities(true);
Document doc = builder.build(new StringReader("<?xml version=\"1.0\"?><root att=\"𐀀 𐀀\" />"));
Format format = Format.getCompactFormat().setEncoding("ISO-8859-1");
StAXStreamOutputter outputter = new StAXStreamOutputter(format);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
XMLStreamWriter xsw = soutfactory.createXMLStreamWriter(baos, "ISO-8859-1");
outputter.output(doc, xsw);