Created here by the grouping logic: https://github.com/NzbDrone/NzbDrone/pull/80/files#diff-1624ac294cf39ec856120955f1175398R26
Assigned here to the AddCollectionView: https://github.com/NzbDrone/NzbDrone/pull/80/files#diff-1624ac294cf39ec856120955f1175398R32