provider/designate.go
func (p designateProvider) getZones() (map[string]string, error) {
	result := map[string]string{}

	err := p.client.ForEachZone(
		func(zone *zones.Zone) error {
			if zone.Type != "" && strings.ToUpper(zone.Type) != "PRIMARY" || zone.Status != "ACTIVE" {
				return nil
			}

			zoneName := canonicalizeDomainName(zone.Name)
			if !p.domainFilter.Match(zoneName) {
				return nil
			}
			result[zone.ID] = zoneName
			return nil
		},
	)

	return result, err
}
func (p designateProvider) getZones() (map[string]string, error) {
	result := map[string]string{}

	err := p.client.ForEachZone(
		func(zone *zones.Zone) error {
			if zone.Type != "" && strings.ToUpper(zone.Type) != "PRIMARY" || zone.Status != "ACTIVE" {
				return nil
			}

			zoneName := canonicalizeDomainName(zone.Name)
			if !p.domainFilter.Match(zoneName) {
				return nil
			}
			result[zone.ID] = zoneName
			return nil
		},
	)

	return result, err
}
// returns ZoneID -> ZoneName mapping for zones that are managed by the Designate and match domain filter