instance method no_routes

# File actionpack/lib/action_dispatch/routing/inspector.rb, line 180
        def no_routes(engine, routes, filter)
          @buffer <<
            if filter.key?(:controller)
              "No routes were found for this controller."
            elsif filter.key?(:grep)
              "No routes were found for this grep pattern."
            elsif routes.none?
              if engine
                "No routes defined."
              else
                <<~MESSAGE
                  You don't have any routes defined!

                  Please add some routes in config/routes.rb.
                MESSAGE
              end
            end

          unless engine
            @buffer << "For more information about routes, see the Rails guide: https://guides.rubyonrails.org/routing.html."
          end
        end