code: public static function forCurrentSystem($code = self::CODE_FOR_SYSTEM, Exception $previous = null)
      {
          $message = self::DEFAULT_MESSAGE . self::MESSAGE_EXTENSION_FOR_SYSTEM;
  
          return new static($message, $code, $previous);
      }
docs: Creates an exception instance for the current system.
  
  @param int $code The exception code.
  @param Exception|null $previous A previous exception used for chaining.
  @return static