docs: public Query range(ByteString start, ByteString end) {
      RowRange.Builder rangeBuilder = RowRange.newBuilder();
      if (start != null) {
        rangeBuilder.setStartKeyClosed(start);
      }
      if (end != null) {
        rangeBuilder.setEndKeyOpen(end);
      }
      builder.getRowsBuilder().addRowRanges(rangeBuilder.build());
      return this;
    }