class Ckeditor::Hooks::CanCanAuthorization

def initialize(controller, ability = ::Ability)

See the +authorize_with+ config method for where the initialization happens. 
def initialize(controller, ability = ::Ability)
  @controller = controller
  @controller.instance_variable_set '@ability', ability
  @controller.extend ControllerExtension
  @controller.current_ability.authorize! :access, :ckeditor
end