code: func (i *TeleInstance) StopNodes() error {
  	var errors []error
  	for _, node := range i.Nodes {
  		if err := node.Close(); err != nil {
  			errors = append(errors, err)
  			log.Errorf("failed closing extra node %v", err)
  		}
  		if err := node.Wait(); err != nil {
  			errors = append(errors, err)
  			log.Errorf("failed stopping extra node %v", err)
  		}
  	}
  	return trace.NewAggregate(errors...)
  }
docs: // StopNodes stops additional nodes