@Test
 public void testXMLencdec() throws IOException {
   Configuration c = new Configuration();
   String m = c.getXMLRepresentationAsString();
   Configuration o = Configuration.makeXMLStringAsConfiguration(m);
   assertNotNull(o);
   m = m.replace('a', 'm');
   try {
     o = Configuration.makeXMLStringAsConfiguration(m);
     fail("makeXmlStringsAsConfiguration should throw exception");
   } catch (Throwable t) {
   }
 }