title: Flutter adding to Custom Drawer
body: <p>After years and years of lurking I've finally got a problem which I can't solve with existing questions.
  My problem is this. I'm working with a student group on an app and I'm not that familiar with Flutter. I want to expand the drawer but I don't know how.
  My piece of code is as follows:</p>
  <pre><code>drawer: CustomDrawer(
      scaffoldKey: _scaffoldKey,
      customListTile: ListTile(
        leading: Icon(Icons.calendar_today),
        title: Text('Calendar'),
        onTap: () {
          Navigator.push(
            context,
            MaterialPageRoute(builder: (context) =&gt; CalendarScreen())
          );
        }
      ),
    )
  </code></pre>
  <p>I want to add more Tiles. How do I do this?
  Thanks!</p>