@Override
    public List<ZuulFilter<?, ?>> putFiltersForClasses(String[] classNames) throws Exception {
        List<ZuulFilter<?, ?>> newFilters = new ArrayList<>();
        for (String className : classNames) {
            newFilters.add(putFilterForClassName(className));
        }
        return Collections.unmodifiableList(newFilters);
    }
@Test
    void testPutFiltersForClassesException() throws Exception {
        Exception caught = null;
        try {
            loader.putFiltersForClasses(new String[] {"asdf"});
        } catch (ClassNotFoundException e) {
            caught = e;
        }
        assertTrue(caught != null);
        Collection<ZuulFilter<?, ?>> filters = registry.getAllFilters();
        assertEquals(0, filters.size());
    }