@Override
    protected void doRemoveListener(final String key) {
        // No need to implement
    }
Instantiates a new Nacos sync data service.

@param configService         the config service
@param pluginDataSubscriber the plugin data subscriber
@param metaDataSubscribers   the meta data subscribers
@param authDataSubscribers   the auth data subscribers
@param proxySelectorDataSubscribers the proxy selector data subscribers
@param discoveryUpstreamDataSubscribers the discovery upstream data subscribers
@param shenyuConfig          the shenyu config
shenyu-sync-data-center/shenyu-sync-data-apollo/src/main/java/org/apache/shenyu/sync/data/apollo/ApolloDataService.java