code: public static function stop($key = 'default'): void {
      if (isset(self::$timers[$key])) {
        self::$timers[$key]->stop();
      } else {
        throw new \LogicException('Stopping timer when the given key timer was not initialized.');
      }
    }
docs: Stops the timer with the given key. Default key is "default"
  
  @param string $key
  
  @throws \LogicException If the attempted timer has not started already.