flutter expanded
Row(
children: [
Container(
height: 100.0,
color: Colors.red,
width: 100.0,
),
Expanded(
child: Container(
height: 100.0,
color: Colors.green,
width: 100.0,
),
),
Container(
height: 100.0,
color: Colors.blue,
width: 100.0,
),
],
)