code: def CopyToDateTimeString(self):
      
      if (self._timestamp is None or self._timestamp < self._INT64_MIN or
          self._timestamp > self._INT64_MAX):
        return None
  
      return super(APFSTime, self)._CopyToDateTimeString()
docs: Copies the APFS timestamp to a date and time string.
  
      Returns:
        str: date and time value formatted as: "YYYY-MM-DD hh:mm:ss.#########" or
            None if the timestamp is missing or invalid.