code: public static function add($routes)
      {
          if (! is_array($routes)) {
              return false;
          }
  
          foreach ($routes as $route => $value) {
              self::$routes[Url::addBackSlash($route)] = $value;
          }
  
          return true;
      }
docs: Add route/s.
  
  @param array $routes → routes to add
  string $routes[0] → route
  string $routes[1] → class@method
  
  @uses \string Url::addBackSlash → add backslash if it doesn't exist
  
  @link https://github.com/Josantonius/PHP-Url
  
  @return bool