public String addFilterForChannel(
            final String id, final int priority, final Predicate predicate, final String endpoint,
            final String channel, final boolean update) {
        return addFilterForChannel(createFilter(id, priority, predicate, endpoint, new PrioritizedFilterStatistics(id)),
                channel, update);
    }
@Test
    void testUpdateFilterDoesNotExist() {
        String result = filterService.addFilterForChannel(prioritizedFilter, DYNAMIC_ROUTER_CHANNEL, true);
        assertEquals("Error: Filter could not be updated -- existing filter found with matching ID: false", result);
    }