the datatablewidget state class holding the data table

main.dart

class _DataTableWidgetState extends State<DataTableWidget> {
  _DataTableWidgetState(this.listOfColumns);

  final Future<List<ConfigData>> listOfColumns;

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<List<ConfigData>>(
        future: this.listOfColumns,
        builder: (context, snapshot) {
          switch (snapshot.connectionState) {
            case ConnectionState.none:
            case ConnectionState.waiting:
              return CircularProgressIndicator();
            default:
              return generateTable(context, snapshot.data);
          }
        });
  }

}