code: public static function route(string $routeClass = null) : RouteBuilder
      {
          $routeClass = $routeClass ? $routeClass : self::$defaultRouteClass;
  
          return new static($routeClass);
      }
docs: Creates a new {@link bitExpert\Pathfinder\RouteBuilder} instance using the given
  $routeClass to create a new route from.
  
  @param string|null $routeClass
  @return RouteBuilder