dart 怎么重写类

[TomVista]

像下面的这个,我重写了 Column,改动其实就'extends CustomFlex',但是我要建一个全参数的生成器.super 也要写全

有其他写法吗?

class CustomColumn extends CustomFlex {
  final List<int> renderLevel;
  CustomColumn({
    this.renderLevel,
    Key key,
    MainAxisAlignment mainAxisAlignment = MainAxisAlignment.start,
    MainAxisSize mainAxisSize = MainAxisSize.max,
    CrossAxisAlignment crossAxisAlignment = CrossAxisAlignment.center,
    TextDirection textDirection,
    VerticalDirection verticalDirection = VerticalDirection.down,
    TextBaseline textBaseline,
    List<Widget> children = const <Widget>[],
  }) : super(
          renderLevel: renderLevel,
          children: children,
          key: key,
          direction: Axis.vertical,
          mainAxisAlignment: mainAxisAlignment,
          mainAxisSize: mainAxisSize,
          crossAxisAlignment: crossAxisAlignment,
          textDirection: textDirection,
          verticalDirection: verticalDirection,
          textBaseline: textBaseline,
        );
}