class ActionController::UrlGenerationError

def corrections
  @corrections ||= begin
    maybe_these = routes&.named_routes&.helper_names&.grep(/#{route_name}/) || []
    maybe_these -= [method_name.to_s] # remove exact match
    DidYouMean::SpellChecker.new(dictionary: maybe_these).correct(route_name)
  end
end