class EtcdConfigSourceBuilder extends AbstractConfigSourceBuilder<EtcdConfigSourceBuilder, EtcdEndpoint> implements PollableSource.Builder<EtcdConfigSourceBuilder>,
                   WatchableSource.Builder<EtcdConfigSourceBuilder, EtcdEndpoint>,
                   ParsableSource.Builder<EtcdConfigSourceBuilder>,
                   Builder<EtcdConfigSource> {

    @Override
    public EtcdConfigSourceBuilder pollingStrategy(PollingStrategy pollingStrategy) {
        return super.pollingStrategy(pollingStrategy);
    }

      EtcdConfigSourceBuilder();

}