code: @NotNull
    public BatchRes postBatch(@NotNull final BatchReq batchReq) throws IOException {
      return doWork(auth -> doRequest(auth, new JsonPost<>(batchReq, BatchRes.class), AuthHelper.join(auth.getHref(), PATH_BATCH)), batchReq.getOperation());
    }
docs: Send batch request to the LFS-server.
  
  @param batchReq Batch request.
  @return Object metadata.
  @throws IOException