int oldRowCount = project.rows.size();
for (int r = 0; r < oldRowCount; r++) {
Row oldRow = project.rows.get(r);
if (oldRow.isCellBlank(cellIndex)) {
newRows.add(oldRow.dup());
continue;
}
Object value = oldRow.getCellValue(cellIndex);
String s = value instanceof String ? ((String) value) : value.toString();