provider/rcode0.go
func (p *RcodeZeroProvider) Zones() ([]*rc0.Zone, error) {

	var result []*rc0.Zone

	zones, err := p.fetchZones()
	if err != nil {
		return nil, err
	}

	for _, zone := range zones {
		if p.DomainFilter.Match(zone.Domain) {
			result = append(result, zone)
		}
	}

	return result, nil
}
func (p *RcodeZeroProvider) Zones() ([]*rc0.Zone, error) {

	var result []*rc0.Zone

	zones, err := p.fetchZones()
	if err != nil {
		return nil, err
	}

	for _, zone := range zones {
		if p.DomainFilter.Match(zone.Domain) {
			result = append(result, zone)
		}
	}

	return result, nil
}
// Zones returns filtered zones if filter is set