copyCellsToClipboard method
Copy a cell rectangle to the system clipboard as TSV.
Implementation
Future<bool> copyCellsToClipboard(Iterable<CellRef> cells) async {
final tsv = cellsAsTsv(cells);
if (tsv.isEmpty) return false;
await Clipboard.setData(ClipboardData(text: tsv));
return true;
}