问题 I want to implement empty state page in Flutter app, when news feed is empty. When there is no activity in feed, I want to show ‘no activity’ . When database has data, I want to load this from StreamBuilder to ListView.builder I try implement with: child: StreamBuilder( stream: collection.snapshots(), builder: (context, snapshot) { if(snapshot.hasData) { return ListView.builder( itemBuilder: (context, index) => build(context, snapshot.data.documents[index]), itemCount: snapshot.data.documents