@Override
    public Object getInternalProperty(String key) {
        return metaData.get(key);
    }
@Test
    void test() {
        RegistryConfig registryConfig = new RegistryConfig();
        registryConfig.setAddress("127.0.0.1");
        registryConfig.setPort(2181);

        String prefix = "dubbo.registry";
        ConfigConfigurationAdapter configConfigurationAdapter = new ConfigConfigurationAdapter(registryConfig, prefix);

        Assertions.assertEquals(configConfigurationAdapter.getInternalProperty(prefix + "." + "address"), "127.0.0.1");
        Assertions.assertEquals(configConfigurationAdapter.getInternalProperty(prefix + "." + "port"), "2181");
    }