title: How can I create Expanded panel
body: <p><a href="https://material.io/guidelines/components/expansion-panels.html#expansion-panels-behavior" rel="nofollow noreferrer">Here</a> is a material design of <code>Expanded panel</code> that looks like:</p>
  
  <p><a href="https://i.stack.imgur.com/WDbS7.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WDbS7.png" alt="enter image description here"></a></p>
  
  <p>I'd like to make a similar one with <code>Flutter</code>, not sure if I've to start with something like the below code or know, and how to complete it!</p>
  
  <pre><code>new ExpansionPanelList(
    children: &lt;ExpansionPanel&gt;[
      new ExpansionPanel(
        headerBuilder: (BuildContext context, bool isExpanded) {
              isExpanded = true;
              return new ListTile(
              // leading: item.iconpic,
              title: new Text(
              "First",
              textAlign: TextAlign.left,
              style: new TextStyle(
              fontSize: 20.0,
              fontWeight: FontWeight.w400,
              ),
              ));
            },
        body: new Text("school"),
        isExpanded: true,
      ),
      new ExpansionPanel(
        headerBuilder: (BuildContext context, bool isExpanded) {
          isExpanded = true;
          return new ListTile(
            // leading: item.iconpic,
              title: new Text(
                "Second",
                textAlign: TextAlign.left,
                style: new TextStyle(
                  fontSize: 20.0,
                  fontWeight: FontWeight.w400,
                ),
              ));
        },
        isExpanded: false,
        body: new Text("hospital"),
      ),
      new ExpansionPanel(
          headerBuilder: (BuildContext context, bool isExpanded) {
            isExpanded = true;
            return new ListTile(
              // leading: item.iconpic,
                title: new Text(
                  "Third",
                  textAlign: TextAlign.left,
                  style: new TextStyle(
                    fontSize: 20.0,
                    fontWeight: FontWeight.w400,
                  ),
                ));
          },
          body: new Text("va facility"),
          isExpanded: true)
      ]),
  </code></pre>
  
  <p><strong>UPDATE</strong></p>
  
  <p>I just need to start and have the empty panels</p>
  
  <p><a href="https://i.stack.imgur.com/PwvCw.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PwvCw.jpg" alt="enter image description here"></a></p>