row.getC().add(createCell("hello world!"));
sheetData.getRow().add(row);
// ADD A COMMENT TO CELL A1
CommentsPart cp = new CommentsPart();
cp.setContents(createComment("A1"));
sheet.addTargetPart(cp);
// Add <legacyDrawing r:id="rId1"/>
VMLPart vmlPart = new VMLPart();
vmlPart.setContents(getVml(0,0)); // corresponds to A1