code: func (c *Client) dumpResponse(resp *http.Response) {
  	if c.tracelog != nil {
  		out, err := httputil.DumpResponse(resp, true)
  		if err == nil {
  			c.tracef("%s\n", string(out))
  		}
  	}
  }
docs: // dumpResponse dumps the given HTTP response to the trace log.