func IsLocalityEmpty(locality *core.Locality) bool {
	if locality == nil || (len(locality.GetRegion()) == 0) {
		return true
	}
	return false
}

func LocalityMatch(proxyLocality *core.Locality, ruleLocality string) bool {
	ruleRegion, ruleZone, ruleSubzone := label.SplitLocalityLabel(ruleLocality)
	regionMatch := ruleRegion == "*" || proxyLocality.GetRegion() == ruleRegion