type 'List<Series<LinearSales, int>>' is not a subtype of type 'List<Series<dynamic, DateTime>>' code example

Example: type 'List' is not a subtype of type 'List'

snapshot.data.documents.map<Widget>((document) {
  return new ListTile(
    title: new Text(document['name']),
    subtitle: new Text("Class"),
  );
}).toList()