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Cancel Alarm
Cancel a currently active or future system alarm.
If there are two or more matching alarms, or on some devices always, Android will show a UI allowing the user to select the desired alarm. Therefore, for best results when automating, it's recommended to give each alarm a unique label and then use that for cancellation.
If the specified alarm is a repeating alarm, then only the next instance is cancelled (the alarm remains enabled)
Some modes are poorly implemented by many Android devices. For instance, snooze time may be ignored.