code: func (r *OpenRequest) Respond(resp *OpenResponse) {
  	out := &openOut{
  		outHeader: outHeader{Unique: uint64(r.ID)},
  		Fh:        uint64(resp.Handle),
  		OpenFlags: uint32(resp.Flags),
  	}
  	r.Conn.respond(&out.outHeader, unsafe.Sizeof(*out))
  }
docs: // Respond replies to the request with the given response.