code: func OpenReaderAtWithRowLimit(r io.ReaderAt, size int64, rowLimit int) (*File, error) {
  	file, err := zip.NewReader(r, size)
  	if err != nil {
  		return nil, err
  	}
  	return ReadZipReaderWithRowLimit(file, rowLimit)
  }
docs: // OpenReaderAtWithRowLimit() take io.ReaderAt of an XLSX file and returns a populated
  // xlsx.File struct for it.