code: @SuppressWarnings("unchecked")
    @Override
    public <T> List<CompletableFuture<T>> batch(List<? extends Row> actions) {
      // TODO: The CompletableFutures need to return Void for Put/Delete.
      return map(asyncRequests(actions), f -> (CompletableFuture<T>) f);
    }
docs: {@inheritDoc}