docs: def _wmi_to_ts(self, wmi_ts):
          ''' Convert a wmi formatted timestamp into an epoch.
          '''
          year, month, day, hour, minute, second, microsecond, tz = to_time(wmi_ts)
          tz_delta = timedelta(minutes=int(tz))
          if '+' in wmi_ts:
              tz_delta = -tz_delta
  
          dt = (
              datetime(year=year, month=month, day=day, hour=hour, minute=minute, second=second, microsecond=microsecond)
              + tz_delta
          )
          return int(calendar.timegm(dt.timetuple()))