class ActionDispatch::Routing::Mapper::Mapping

def check_controller_and_action(path_params, controller, action)
  hash = check_part(:controller, controller, path_params, {}) do |part|
    translate_controller(part) {
      message = +"'#{part}' is not a supported controller name. This can lead to potential routing problems."
      message << " See https://guides.rubyonrails.org/routing.html#specifying-a-controller-to-use"
      raise ArgumentError, message
    }
  end
  check_part(:action, action, path_params, hash) { |part|
    part.is_a?(Regexp) ? part : part.to_s
  }
end