Providing multi process network wide Mutex on the atPlatform (atsign.com) in 18 lines

    try {
      await atClient.put(
        mutexKey,
        'lock',
        putRequestOptions: pro,
      );
      logger.shout('😎 Will handle request from ${notification.from}'
          '; acquired mutex $mutexKey');
    } catch (err) {
      if (err.toString().toLowerCase().contains('immutable')) {
        logger.shout('🤷‍♂️ Will not handle request from ${notification.from}'
            '; did not acquire mutex $mutexKey');
        return;
      } else {
        logger.shout('Will not handle; did not acquire mutex $mutexKey : $err');
      }
      return;
    }