code: public static RequestRoute getReverseRoute(String key) {
          Objects.requireNonNull(key, Required.KEY.toString());
          return reverseRoutes.get(key.toLowerCase(Locale.ENGLISH));
      }
docs: Retrieves a reverse route by its controller class and controller method
  
  @param key The controller class and method in the form ControllerClass:ControllerMethod
  @return A route object based on the given controller and method or null if none found