printColumnsString method
Implementation
@override
Future<void> printColumnsString({required List<ColumnMaker> cols}) async {
final jsonCols = List<Map<String, String>>.from(
cols.map<Map<String, String>>((ColumnMaker col) => col.toJson()));
Map<String, dynamic> arguments = <String, dynamic>{
"cols": json.encode(jsonCols)
};
await methodChannel.invokeMethod<void>('printColumnsString', arguments);
}