code: func peerURLFromConnectionFailedStatus(details []interface{}) string {
  	if len(details) != 0 {
  		url, ok := details[0].(string)
  		if ok {
  			return endpoint.ToAddress(url)
  		}
  	}
  	return ""
  }
docs: // peerURLFromConnectionFailedStatus extracts the peer url from the status error
  // details