code: func getIPTablesWaitFlag(vstring string) []string {
  	version, err := utilversion.ParseGeneric(vstring)
  	if err != nil {
  		klog.Errorf("vstring (%s) is not a valid version string: %v", vstring, err)
  		return nil
  	}
  
  	minVersion, err := utilversion.ParseGeneric(WaitMinVersion)
  	if err != nil {
  		klog.Errorf("WaitMinVersion (%s) is not a valid version string: %v", WaitMinVersion, err)
  		return nil
  	}
  	if version.LessThan(minVersion) {
  		return nil
  	}
  
  	minVersion, err = utilversion.ParseGeneric(WaitSecondsMinVersion)
  	if err != nil {
  		klog.Errorf("WaitSecondsMinVersion (%s) is not a valid version string: %v", WaitSecondsMinVersion, err)
  		return nil
  	}
  	if version.LessThan(minVersion) {
  		return []string{WaitString}
  	}
  	return []string{WaitString, WaitSecondsValue}
  
  }
docs: // Checks if iptables version has a "wait" flag