code: func (c *Conn) Reply(ctx context.Context, id ID, result interface{}) error {
  	resp := &Response{ID: id}
  	if err := resp.SetResult(result); err != nil {
  		return err
  	}
  	_, err := c.send(ctx, &anyMessage{response: resp}, false)
  	return err
  }
docs: // Reply sends a successful response with a result.