# File lib/google-authenticator-rails/action_controller/rails_adapter.rb, line 22
      def self.included(klass)
        raise RailsAdapter::LoadedTooLateError.new if defined?(::ApplicationController)

        method = klass.respond_to?(:prepend_before_action) ? :prepend_before_action : :prepend_before_filter
        klass.send(method, :activate_google_authenticator_rails)
      end