setCellText method
Set the text of a cell at the given row and col.
Implementation
Future<void> setCellText(int row, int col, String text) async {
await VolvoxGridService.UpdateCells(UpdateCellsRequest()
..gridId = _gridId
..cells.add(CellUpdate()
..row = row
..col = col
..value = (CellValue()..text = text)));
notifyListeners();
}