Expand widget to match parent height inside the row in flutter - flutter

Question

I want to create below UI
How to draw a line between widget, If try to expand the column line inside the row it gives error of infinity height
//Below some code not able to post all the code.
ListView(
shrinkWrap: true,
children: <Widget>[
new _Row(
label: "1",
body:
"Screening: We will screen your current portfolio to check your Portfolio's health.",
),
SizedBox(
height: 16,
),
],
),
class _Row extends StatelessWidget {
final String label;
final String body;
const _Row({Key key, this.label, this.body});
#override
Widget build(BuildContext context) {
return Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Container(
width: 28,
height: 28,
decoration: BoxDecoration(
color: Color(0xff76587b).withOpacity(0.5),
shape: BoxShape.circle,
),
child: Center(
child: Text(
label,
textAlign: TextAlign.start,
style: TextStyle(
color: Colors.white,
fontSize: 16,
fontWeight: FontWeight.w500),
),
),
),
SizedBox(
width: 16,
),
Flexible(
child: Text(
body,
style: kModelTargetCARGTInactiveTextLabel.copyWith(
color: Colors.black, height: 1.4),
),
),
],
);
}
}
In this code line between bullet points not visible. I tried may option but it not working.