Rails Cells 4: access Devise helpers

I have a simple Cells example that I would like to integrate with Devise and Rails. However, all examples and questions seem to be for Cells 3. The following fails in my app (line numbers added).

line 1: class UserCell < Cell::ViewModel
line 2:   include Devise::Controllers::Helpers
line 3:
line 4:   def index
line 5:     render
line 6:   end
line 7: end

Raises this error for line 2.

undefined method `helper_method' for UserCell:Class

Turns out that Cells is no longer configured to work the same way with Rails by default (via Cell::Rails). I had to add abstract controller helpers, but this got me all of the devise helpers in my cell automatically.

class UserCell < Cell::ViewModel
   include AbstractController::Helpers
   include Devise::Controllers::Helpers

   def index
     render
   end
 end