func (p *Pinger) RemoveIPAddr(ip *net.IPAddr) {
	p.mu.Lock()
	delete(p.addrs, ip.String())
	p.mu.Unlock()
}
func (p *Pinger) RemoveIPAddr(ip *net.IPAddr) {
	p.mu.Lock()
	delete(p.addrs, ip.String())
	p.mu.Unlock()
}
func ( p * Pinger ) RemoveIPAddr ( ip * net . IPAddr ) { p . mu . Lock ( ) delete ( p . addrs , ip . String ( ) ) p . mu . Unlock ( ) }
// RemoveIPAddr removes an IP address from Pinger. ip arg should be a net.IPAddr
// pointer.
RemoveIPAddr removes an IP address from Pinger . ip arg should be a net . IPAddr pointer .