    @Test
    public void testList() {

        System.out.println(" ===testList=== ");
        Collection<Plugin> list = pluginManager.list();
        for (Plugin p : list) {
            System.out.println(" plugin: " + p.getName() + "; " + p.getClass().getName());
        }
        //Assert.isTrue(list.size() > 0);
    }