我在颤振中遇到空安全问题

我在 Flutter 中遇到空安全问题，我想将数据放入其中水平数据表 https://pub.dev/packages/horizontal_data_table在 Flutter 中，我用StreamBuilder但是当我在小部件内调用它时，它显示错误：

无法无条件访问属性“paidLeaveTypeName”，因为接收者可以为“null”。 尝试使访问成为有条件的（使用“？.”）或向目标添加空检查（“！”）。

这是完整的代码Column itself:

Widget _generateRightHandSideColumnRow(BuildContext context, int index) {
    return Row(
      children: <Widget>[
        Container(
          width: 200,
          height: 52,
          padding: const EdgeInsets.fromLTRB(5, 0, 0, 0),
          alignment: Alignment.centerLeft,
          child: StreamBuilder<dynamic>(
            stream: _leavelistbloc.DataStream,
            builder: (context, snapshot) {
              if (snapshot.hasData) {
                switch (snapshot.data!.status!) {
                  case Status.INITIAL:
                    return Text('');
                  case Status.LOADING:
                    return Text('');
                  case Status.COMPLETED:
                    LeaveListModel responses =
                        snapshot.data!.data as LeaveListModel;
                    return Text(responses.response.paidLeaveTypeName);
                  case Status.ERROR:
                    return Text('');
                }
              }
              return Container();
            },
          ),
        ),
      ],
    );
  }
}

这正是错误代码的所在：

                case Status.COMPLETED:
                    LeaveListModel responses =
                        snapshot.data!.data as LeaveListModel;
                    return Text(responses.response.paidLeaveTypeName);

结果的模型数据如下所示：

class LeaveListResult {
  int? paidLeaveId;
  String? paidLeaveUuid;
  String? paidLeaveTypeName;
  String? paidLeaveEmployeeUuid;
  String? paidLeaveEmployeeNip;
  String? paidLeaveEmployeeFullName;
}

但如果您想知道模型的完整代码是什么样的，您可以在here https://pastecode.io/s/p3e1s9qi有谁知道如何处理这个问题或如何使用horizo​​ntal_data_table调用数据StreamBuilder?

通过检查空响应尝试这种方式

  final result  = responses.response?.result;
   if(result==null) Text("got null result");
   else if (result!.length > 0) {