drawer.dart

 return Drawer(
      child: ListView(
        padding: EdgeInsets.zero,
        children: <Widget>[
          _createHeader(),
          _createDrawerItem(icon: Icons.contacts, text: 'Contacts',  onTap: () => ...)
          Divider(),
          _createDrawerItem(icon: Icons.event, text: 'Events',  onTap: () => ...)
        ],
      ),
    );