[c] Deleting a model.
[c] Adding child routes.
[c] Transitioning to show only incomplete todos.
[c] Transitioning to show only complete todos.
[c] Transitioning back to show all todos.
[c] Displaying a button to remove all completed todos.
[c] Indicating when all todos are complete.
[c] Toggling all todos between complete and incomplete.
[c] Replacing the fixture adapter with another adapter.