我正在制作一个简单的应用程序，其中有一个模型，其中有2个项目.我想在listView builder中访问列表，但它给出了一个错误.建议我一个访问它的好方法.提前谢谢.
model.dart
import 'package:flutter/material.dart';
class FirstSem {
String? title;
String? code;
FirstSem({this.title,this.code});
}
List <FirstSem> subject=[
FirstSem(title: "MatheMatics",code: "MTH162"),
FirstSem(title:"Physice",code:"Phy162"),
FirstSem(title:"Digital Logic",code:"csc 162"),
FirstSem(title:"C Programming",code:"csc 159"),
FirstSem(title:"Introduction of Information Technology",code:"csc 160"),
];
main.dart
ListView.builder(itemCount: 5, itemBuilder: (context, index) {
return ListTile(
title: Text(FirstSem[index].title),
trailing: Text(FirstSem[index].code),
);
})