public static CompositeMeterRegistry getMeterRegistry(String registry) {
        return METER_REGISTRIES.get(registry);
    }
@Test
    void testGetMeterRegistry() {
        assertNotNull(NacosMeterRegistryCenter.getMeterRegistry(NacosMeterRegistryCenter.CORE_STABLE_REGISTRY));
        assertNotNull(NacosMeterRegistryCenter.getMeterRegistry(NacosMeterRegistryCenter.CONFIG_STABLE_REGISTRY));
        assertNotNull(NacosMeterRegistryCenter.getMeterRegistry(NacosMeterRegistryCenter.NAMING_STABLE_REGISTRY));
        assertNotNull(NacosMeterRegistryCenter.getMeterRegistry(NacosMeterRegistryCenter.TOPN_CONFIG_CHANGE_REGISTRY));
        assertNotNull(NacosMeterRegistryCenter.getMeterRegistry(NacosMeterRegistryCenter.TOPN_SERVICE_CHANGE_REGISTRY));
    }