code: func (c *Client) Ping(ctx context.Context) error {
  	pc := &http.Client{
  		Transport: c.http.Transport,
  		Timeout:   5 * time.Second,
  	}
  	resp, err := pc.Get("http://unix/ping")
  	if err != nil {
  		return err
  	}
  	_ = resp.Body.Close()
  	return nil
  }
docs: // Ping checks connectivity to the agent