@Test
public void eachNull() throws MalformedObjectNameException, NotCompliantMBeanException, InstanceAlreadyExistsException, MBeanException, IOException, ReflectionException {

    executor.each(null, new MBeanServerExecutor.MBeanEachCallback() {
        public void callback(MBeanServerConnection pConn, ObjectName pName) throws ReflectionException, InstanceNotFoundException, IOException, MBeanException {
            checkHiddenMBeans(pConn, pName);
        }
    });
}