'Build an object `Zone` from the item dictionary
:param item: item to build the zone from
:type item: `dictionary`
:rtype: :instance: `Zone`'

def _to_zone(self, item):

    type = 'master'
    extra = {'date_created': item['date_created']}
    zone = Zone(id=item['domain'], domain=item['domain'], driver=self, type=type, ttl=None, extra=extra)
    return zone
