code: func (r *GetxattrRequest) Respond(resp *GetxattrResponse) {
  	out := &getxattrOut{
  		outHeader: outHeader{Unique: uint64(r.ID)},
  		Size:      uint32(len(resp.Xattr)),
  	}
  	r.Conn.respondData(&out.outHeader, unsafe.Sizeof(*out), resp.Xattr)
  }
docs: // Respond replies to the request with the given response.