public static AlarmExistsResult Check(IAlarmManager alarmManager, Guid alarmPeriodId)
{
if (alarmManager == null) throw new ArgumentException(nameof(alarmManager));
var alarmPeriod = alarmManager.FindAlarmPeriod(alarmPeriodId);
return Check(alarmPeriod, "不存在对应的闹钟。");
}
