@Override
    public void batchUnRegister(List<ProviderConfig> configs) {
        for (ProviderConfig config : configs) {
            unRegister(config);
        }
    }
the main logic of polaris registry, similar to consul

@author <a href=mailto:bner666@gmail.com>ZhangLibin</a>
registry/registry-polaris/src/main/java/com/alipay/sofa/rpc/registry/polaris/PolarisRegistry.java