ExpandablePanel内的Gridview构建器显示错误不正确使用ParentDataWidget

Question

ExpandablePanel中的Gridview构建器显示错误不正确使用ParentDataWidget。

  Widget getBody2(int i,int j){
        return ExpandablePanel(
          header: Align(
            alignment: Alignment.centerLeft,
            child:  Padding(
              padding: const EdgeInsets.only(left: 8,top: 8,bottom: 1),
              child:Align(
                alignment: Alignment.centerLeft,
                child:  Text(mProductModule.businessCard[i].filedList[j].title,style: TextStyle(fontSize: 18,fontWeight: FontWeight.bold),textAlign: TextAlign.left,),
              ),
            ),
          ),
          collapsed:  Align(
            alignment: Alignment.centerLeft,
            child: Padding(
              padding: const EdgeInsets.only(left: 8),
              child: Text(mProductModule.businessCard[i].filedList[j].child[0].label,
          ),
            )),
          expanded:Flexible(child: getBody(i,j)),
          tapHeaderToExpand: true,
          hasIcon: true,
        );
    }
  Widget getBody(int i,j){

    return GridView.builder(
      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
      itemBuilder: (_, index) => Text("wedwqe"),
      itemCount: 4,
    );
  }

  

可扩展：^ 4.0.1