test/regression/0200/0235.unit

>>>
class _MultiSelectionModelImpl<T>
    extends ChangeNotifier
    with SelectionChangeNotifier<T>
    implements SelectionModel<T> {
  // ...
}
<<<
class _MultiSelectionModelImpl<T> extends ChangeNotifier
    with SelectionChangeNotifier<T>
    implements SelectionModel<T> {
  // ...
}