Flutter 超出部分显示

SizedBox(
  width: 300,
  height: 150,
  child: OverflowBox(
    alignment: Alignment.topLeft,
    maxWidth:  300,
    maxHeight: 300,
    child: Container(
      width: 300,
      height: 200,
      color: Colors.yellowAccent,
    ),
  ),
),