code: func sessionResumeScan(addr, hostname string) (grade Grade, output Output, err error) {
  	config := defaultTLSConfig(hostname)
  	config.ClientSessionCache = tls.NewLRUClientSessionCache(1)
  
  	conn, err := tls.DialWithDialer(Dialer, Network, addr, config)
  	if err != nil {
  		return
  	}
  	if err = conn.Close(); err != nil {
  		return
  	}
  
  	return multiscan(addr, func(addrport string) (g Grade, o Output, e error) {
  		var conn *tls.Conn
  		if conn, e = tls.DialWithDialer(Dialer, Network, addrport, config); e != nil {
  			return
  		}
  		conn.Close()
  
  		if o = conn.ConnectionState().DidResume; o.(bool) {
  			g = Good
  		}
  		return
  	})
  }
docs: // SessionResumeScan tests that host is able to resume sessions across all addresses.