@Override
    public Config build() {
        return build(new Config());
    }
@Override
    @Test
    public void testConfigurationURL()
            throws Exception {
        URL configURL = getClass().getClassLoader().getResource("hazelcast-default.yaml");
        Config config = new YamlConfigBuilder(configURL).build();
        assertEquals(configURL, config.getConfigurationUrl());
        assertNull(config.getConfigurationFile());
    }