docs: public void compose(OutputStream stream, String rootName, Type type)  throws IOException {
  		xml = new XMLWriter(stream, "UTF-8");
  		xml.setPretty(style == OutputStyle.PRETTY);
  		xml.start();
  		xml.setDefaultNamespace(FHIR_NS);
  		composeType(Utilities.noString(rootName) ? "value" : rootName, type);
  		xml.end();
  	}