code: func (i *TeleInstance) StopProxy() error {
  	var errors []error
  
  	for _, p := range i.Nodes {
  		if p.Config.Proxy.Enabled {
  			if err := p.Close(); err != nil {
  				errors = append(errors, err)
  				log.Errorf("Failed closing extra proxy: %v.", err)
  			}
  			if err := p.Wait(); err != nil {
  				errors = append(errors, err)
  				log.Errorf("Failed to stop extra proxy: %v.", err)
  			}
  		}
  	}
  
  	return trace.NewAggregate(errors...)
  }
docs: // StopProxy loops over the extra nodes in a TeleInstance and stops all
  // nodes where the proxy server is enabled.