code: func (client *Client) UpdateRunstatusMaintenance(ctx context.Context, maintenance RunstatusMaintenance, event RunstatusEvent) error {
  	if maintenance.EventsURL == "" {
  		return fmt.Errorf("empty Events URL for %#v", maintenance)
  	}
  
  	_, err := client.runstatusRequest(ctx, maintenance.EventsURL, event, "POST")
  	return err
  }
docs: // UpdateRunstatusMaintenance adds a event to a maintenance.
  // Events can be updates or final message with status completed.