[JAVA] Output XML tree to file

public static void export(Document doc, File file) throws TransformerException {
    TransformerFactory transFactory = TransformerFactory.newInstance();
    Transformer transformer = transFactory.newTransformer();
    transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
    transformer.setOutputProperty(OutputKeys.INDENT, "yes");
    transformer.setOutputProperty(OutputKeys.METHOD, "xml");
    Source src = new DOMSource(doc);
    Result result = new StreamResult(file);
    transformer.transform(src, result);
}

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