Get the identifier of this #GTimeZone, as passed to g_time_zone_new().
If the identifier passed at construction time was not recognised, UTC will
be returned. If it was %NULL, the identifier of the local timezone at
construction time will be returned.
The identifier will be returned in the same format as provided at
construction time: if provided as a time offset, that will be returned by
this function.
Get the identifier of this #GTimeZone, as passed to g_time_zone_new(). If the identifier passed at construction time was not recognised, UTC will be returned. If it was %NULL, the identifier of the local timezone at construction time will be returned.
The identifier will be returned in the same format as provided at construction time: if provided as a time offset, that will be returned by this function.