code: private function writeLegacyDrawing(XMLWriter $objWriter, PhpspreadsheetWorksheet $pSheet)
      {
          // If sheet contains comments, add the relationships
          if (count($pSheet->getComments()) > 0) {
              $objWriter->startElement('legacyDrawing');
              $objWriter->writeAttribute('r:id', 'rId_comments_vml1');
              $objWriter->endElement();
          }
      }
docs: Write LegacyDrawing.
  
  @param XMLWriter $objWriter XML Writer
  @param PhpspreadsheetWorksheet $pSheet Worksheet