var items = [];

  Widget buildExpansionList() {
    if (items.length == 0) {
      "Nunquam anhelare ionicis tormento est regius abnoba"
          .split(" ")
          .forEach((t) {
        items.add({
          "title": t,
          "expanded": false,
          "color": Colors.green,
        });
      });
    }
    return SingleChildScrollView(
      child: ExpansionPanelList(
        expansionCallback: (int index, bool isExpanded) {
          setState(() {
            items[index]["expanded"] = !items[index]["expanded"];
          });
        },
        children: items.map((item) {
          return ExpansionPanel(
            isExpanded: item["expanded"],
            headerBuilder: (BuildContext context, bool isExpanded) {
              return Text(
                item["title"],
                style: Theme.of(context).textTheme.display1,
              );
            },
            body: Container(
              width: double.infinity,
              color: item["color"].withOpacity(0.4),
              child: IconButton(
                iconSize: 64.0,
                color: item["color"],
                icon: Icon(Icons.colorize),
                onPressed: () {
                  setState(() {
                    item["color"] = (item["color"] == Colors.red
                        ? Colors.green
                        : Colors.red);
                  });
                },
              ),
            ),
          );
        }).toList(),
      ),
    );
  }