code: func Fuzz(data []byte) int {
  	c := caddy.NewTestController("dns", "proxy . 8.8.8.8:53")
  	up, err := NewStaticUpstreams(&c.Dispenser)
  	if err != nil {
  		return 0
  	}
  	p := &Proxy{Upstreams: &up}
  
  	return fuzz.Do(p, data)
  }
docs: // Fuzz fuzzes proxy.