buildItems.dart

  Widget buildItems(dataList) => ListView.separated(
      padding: const EdgeInsets.all(8),
      itemCount: dataList.length,
      separatorBuilder: (BuildContext context, int index) => const Divider(),
      itemBuilder: (BuildContext context, int index) {
        return ListTile(
          title: Text(
            dataList[index]["Name"],
          ),
          subtitle:  Text(dataList[index]["Dept"]),
          trailing: Text(
            dataList[index]["RollNo"],
          ),
        );
      });