```ruby
module BlacklightCornellRequests
  class ApplicationController < ApplicationController #ActionController::Base
    layout 'layouts/blacklight' 
  end
end
```

Fix circular reference error brought on by Rails 4.x.
user
```ruby
module BlacklightCornellRequests
  class ApplicationController < ::ApplicationController #ActionController::Base
    layout 'layouts/blacklight'
  end
end
```
assistant