title: Flutter-GetX; Update list in item of list
body: <p>I'm having a problem, I have a list let say (ListOne) and each item has a list let say (ListTwo), when I enter an item into ListOne, <code>ListView.builder</code>/<code>ListView.separated</code> for ListOne it works while when I enter an item into ListTwo <code>ListView.builder</code>/<code>ListView.separated</code> for ListTwo it doesn't it works, I've tried using the <code>Obx</code> Widget but it doesn't work</p>
  <p>this is my <code>LisView</code> for ListOne</p>
  <pre><code>ListView.separated(
      itemBuilder: (context, index) {
           var _listOneItem = controller.listOne.elementAt(index);
           return ListOneItemWidget(item: __listOneItem);
      },
      separatorBuilder: (context, index) =&gt; SizedBox(height: 10.0),
      itemCount: controller.listOne.length,
  ),
  </code></pre>
  <p>and this is my <code>ListView</code> for ListTwo</p>
  <pre><code>ListView.builder(
      itemBuilder: (context, index) {
          var _listTwoItem = listOneItem.ListTwo.elementAt(index);
          return ListTwoItemWidget(item: _listTwoItem);
      },
      itemCount: listOneItem.ListTwo.length,
      shrinkWrap: true,
      physics: NeverScrollableScrollPhysics(),
  ),
  </code></pre>