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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _parse_date_time_time_zone(self, date_time_time_zone):
 """ Parses and convert to protocol timezone a dateTimeTimeZone resource This resource is a dict with a date time and a windows timezone This is a common structure on Microsoft apis so it's included here. """

        if date_time_time_zone is None:
            return None

        local_tz = self.protocol.timezone
        if isinstance(date_time_time_zone, dict):
            try:
                timezone = pytz.timezone(
                    get_iana_tz(date_time_time_zone.get(self._cc('timeZone'), 'UTC')))
            except pytz.UnknownTimeZoneError:
                timezone = local_tz
            date_time = date_time_time_zone.get(self._cc('dateTime'), None)
            try:
                date_time = timezone.localize(parse(date_time)) if date_time else None
            except OverflowError as e:
                log.debug('Could not parse dateTimeTimeZone: {}. Error: {}'.format(date_time_time_zone, str(e)))
                date_time = None

            if date_time and timezone != local_tz:
                date_time = date_time.astimezone(local_tz)
        else:
            # Outlook v1.0 api compatibility (fallback to datetime string)
            try:
                date_time = local_tz.localize(parse(date_time_time_zone)) if date_time_time_zone else None
            except Exception as e:
                log.debug('Could not parse dateTimeTimeZone: {}. Error: {}'.format(date_time_time_zone, str(e)))
                date_time = None

        return date_time