@Test
 public void testInvalidMapperDefaults() {
   Properties props = new Properties();
   props.put("com.netflix.servo.DefaultMonitorRegistry.jmxMapperClass", "com.my.invalid.class");
   DefaultMonitorRegistry registry = new DefaultMonitorRegistry(props);
   BasicCounter counter =
       new BasicCounter(new MonitorConfig.Builder("testInvalidMapperDefaults").build());
   registry.register(counter);
   ObjectName expectedName =
       ObjectNameMapper.DEFAULT.createObjectName("com.netflix.servo", counter);
   assertEquals(expectedName.getDomain(), "com.netflix.servo");
   assertTrue(ManagementFactory.getPlatformMBeanServer().isRegistered(expectedName));
 }
 @Override
 public ObjectName createObjectName(String domain, Monitor<?> monitor) {
   return ObjectNameMapper.DEFAULT.createObjectName(domain + ".Renamed", monitor);
 }