// Clean legacy entries
		for _, entry := range currentIPSetEntries.Difference(set.activeEntries).UnsortedList() {
			if err := set.handle.DelEntry(entry, set.Name); err != nil {
				if !utilipset.IsNotFoundError(err) {
					klog.ErrorS(err, "Failed to delete ip set entry from ip set", "ipSetEntry", entry, "ipSet", set.Name)
				}
			} else {

		return nil
	}
	return fmt.Errorf("unsupported HashFamily %q", family)
}

// IsNotFoundError returns true if the error indicates "not found".  It parses
// the error string looking for known values, which is imperfect but works in
// practice.
func IsNotFoundError(err error) bool {
	es := err.Error()
	if strings.Contains(es, "does not exist") {
		// set with the same name already exists

	// iptables-nft-1.8.2 [...] -j BAD-CHAIN
	"does not exist",
}

// IsNotFoundError returns true if the error indicates "not found".  It parses
// the error string looking for known values, which is imperfect; beware using
// this function for anything beyond deciding between logging or ignoring an
// error.
func IsNotFoundError(err error) bool {
	es := err.Error()
	for _, str := range iptablesNotFoundStrings {

			if !utiliptables.IsNotFoundError(err) {
				logger.Error(err, "Error removing iptables rules in ipvs proxier")
				encounteredError = true
			}
		}
	}

	// Remove all of our chains.
	for _, ch := range iptablesCleanupChains {
		if err := ipt.DeleteChain(ch.table, ch.chain); err != nil {
			if !utiliptables.IsNotFoundError(err) {

		args := append(jump.extraArgs,
			"-m", "comment", "--comment", jump.comment,
			"-j", string(jump.dstChain),
		)
		if err := ipt.DeleteRule(jump.table, jump.srcChain, args...); err != nil {
			if !utiliptables.IsNotFoundError(err) {
				logger.Error(err, "Error removing pure-iptables proxy rule")
				encounteredError = true
			}
		}
	}

	// Flush and remove all of our "-t nat" chains.
	iptablesData := bytes.NewBuffer(nil)