rowsAsTsv method
Implementation
String rowsAsTsv(Iterable<int> rowIndices, {bool includeHeader = false}) {
final rs = rowIndices.where((r) => r >= 0 && r < rowCount).toSet().toList()..sort();
if (rs.isEmpty) return '';
final buf = <String>[];
if (includeHeader) buf.add([for (final c in columns) _san(c.label)].join('\t'));
for (final r in rs) {
buf.add([for (var c = 0; c < colCount; c++) _san(cellText(r, c))].join('\t'));
}
return buf.join('\n');
}