static {
   xs = new XStream(new DomDriver());
   xs.alias("pipe", FilterPipeInfo.class);
   xs.alias("svr", String.class);
   // xs.alias("dfas", (new String[0]).getClass());
   // xs.alias("name", null);
 }
 @Override
 protected XStream createXStream() {
   XStream ret = super.createXStream();
   ret.alias("errors", Errors.class);
   ret.alias("error", Error.class);
   ret.addImplicitCollection(Error.Parameters.class, "parameters", "parameter", String.class);
   return ret;
 }