Get cell value from table - flutter - flutter

Question

I have created a table from an imported CSV file, I have set this table to be hidden as I don't want the user to actually see the table.
I have also created a custom widget to be reused several times throughout my app, it's just a container that displays some text. Here is the code for the table:
import 'package:flutter/material.dart';
import 'package:csv/csv.dart';
import 'package:flutter/services.dart' show rootBundle;
class RouteNameTable extends StatefulWidget {
const RouteNameTable({Key key}) : super(key: key);
#override
_RouteNameTableState createState() => _RouteNameTableState();
}
class _RouteNameTableState extends State<RouteNameTable> {
List<List<dynamic>> data = [];
void loadAsset() async {
final myData = await rootBundle.loadString("assets/routes.csv");
List<List<dynamic>> csvTable = const CsvToListConverter().convert(myData);
data = csvTable;
setState(() {});
}
#override
void initState() {
super.initState();
loadAsset();
}
#override
Widget build(BuildContext context) {
return Visibility(
visible: false,
child: SingleChildScrollView(
child: Table(
border: TableBorder.all(width: 1.0),
children: data.map((item) {
return TableRow(
children: item.map((row) {
return Container(
color: Colors.blueGrey,
child: Padding(
padding: const EdgeInsets.all(1.0),
child: Text(
row.toString(),
style: const TextStyle(fontSize: 20.0),
),
),
);
}).toList());
}).toList(),
),
),
);
}
}
The custom widget I created is just a container that displays a number, name and has a colour. When inserting the widget I use the following code
const RouteTemplate(
routeNumber: '33',
routeName: 'Corstorphine - Caversham - City - Wakari',
routeColor: Color(0xFFF067A6),
),
This works correctly. However, what I want to do is replace the text (such as '33') that I have typed with data from the table I created. It will still say 33 but instead of me typing it, it retrieves the first column in the second row as routeNumber, the second column in the second row as routeName and so on. I would like this as the CSV file may change, and instead of having to add/remove/change the route number, once the new CSV file is added it will do it automatically.
Thanks