Class used to find view element in flutter code example

Example 1: flutter listview

ListView(
  padding: const EdgeInsets.all(8),
  children: <Widget>[
    Container(
      height: 50,
      color: Colors.amber[600],
      child: const Center(child: Text('Entry A')),
    ),
    Container(
      height: 50,
      color: Colors.amber[500],
      child: const Center(child: Text('Entry B')),
    ),
    Container(
      height: 50,
      color: Colors.amber[100],
      child: const Center(child: Text('Entry C')),
    ),
  ],
)

Example 2: listview flutter

Widget _myListView(BuildContext context) {

      // backing data
      final europeanCountries = ['Albania', 'Andorra', 'Armenia', 'Austria', 
        'Azerbaijan', 'Belarus', 'Belgium', 'Bosnia and Herzegovina', 'Bulgaria',
        'Croatia', 'Cyprus', 'Czech Republic', 'Denmark', 'Estonia', 'Finland',
        'France', 'Georgia', 'Germany', 'Greece', 'Hungary', 'Iceland', 'Ireland',
        'Italy', 'Kazakhstan', 'Kosovo', 'Latvia', 'Liechtenstein', 'Lithuania',
        'Luxembourg', 'Macedonia', 'Malta', 'Moldova', 'Monaco', 'Montenegro',
        'Netherlands', 'Norway', 'Poland', 'Portugal', 'Romania', 'Russia',
        'San Marino', 'Serbia', 'Slovakia', 'Slovenia', 'Spain', 'Sweden', 
        'Switzerland', 'Turkey', 'Ukraine', 'United Kingdom', 'Vatican City'];

      return ListView.builder(
        itemCount: europeanCountries.length,
        itemBuilder: (context, index) {
          return ListTile(
            title: Text(europeanCountries[index]),
          );
        },
      );

    }