Route::pattern PHP Method

        public static function pattern($key, $pattern)
        {
            \Illuminate\Routing\Router::pattern($key, $pattern);
        }

 /**
  * @param Route $route
  *
  * @return mixed
  */
 public function dispatch(Route $route)
 {
     $handler = $route->handler();
     if (!is_callable($handler) && $this->resolver !== null) {
         $handler = call_user_func($this->resolver, $handler);
     }
     if (is_callable($handler)) {
         return call_user_func_array($handler, $route->attributes());
     }
     throw new \ErrorException("Target specified for '{$route->pattern()}' cannot be called");
 }