Swap Position of ListTileIcon and Checkbox in Flutter

I'm greenhorn using flutter and stackoverflow (active) as well. So, I'm sorry about any unusal behavior. And because of this, I'm sure, I share too much code... just to make sure.

Problem: I have to swap positions of dropdown arrow and checkbox.

...
      body: Container(
          margin: EdgeInsets.all(12.0),
          decoration: BoxDecoration(
            borderRadius: BorderRadius.all(Radius.circular(12)),
          ),
          child: Container(
              child: ListView.builder(
                itemCount: entries.length,
                itemBuilder: (BuildContext context, int index) {
                  return new Column(
                      children: <Widget>[
                        CheckboxListTile(
                            value: true,
                            title: DataPopUp(entries[index]),
                            onChanged: null,

...

...
      Widget _buildTiles(DataList root) {
        if (root.children.isEmpty)
          return ListTile(
              title: Text(root.title)
          );
        return ExpansionTile(
          key: PageStorageKey<DataList>(root),
          title: Text(
            root.title,
            style: AppTheme.appTextStyles.dropdownTourText,
          ),
          children: root.children.map(_buildTiles).toList(),
        );
...

screenshot of list with checkbox