func (n *npmp) DeleteMapping(protocol string, extPort, intPort int) (err error) {
	_, err = n.c.AddPortMapping(strings.ToLower(protocol), intPort, 0, 0)
	return err
}
func (n *npmp) DeleteMapping(protocol string, extPort, intPort int) (err error) {
	_, err = n.c.AddPortMapping(strings.ToLower(protocol), intPort, 0, 0)
	return err
}
func ( n * npmp ) DeleteMapping ( protocol string , extPort , intPort int ) ( err error ) { _ , err = n . c . AddPortMapping ( strings . ToLower ( protocol ) , intPort , 0 , 0 ) return err }
// DeleteMapping removes the port mapping to NAT-PMP interface.
DeleteMapping removes the port mapping to NAT - PMP interface .