code: def from_zone(zone):
      '''Build a GeoID from a given zone'''
      validity = zone.validity.start if zone.validity else None
      return build(zone.level, zone.code, validityf from_zone(zone):
      '''Build a GeoID from a given zone'''
      validity = zone.validity.start if zone.validity else None
      return build(zone.level, zone.code, validity)
docs: Build a GeoID from a given zone