code: func (n *Node) GetVersion() *api.Version {
  	n.stopMu.RLock()
  	defer n.stopMu.RUnlock()
  
  	if !n.IsMember() {
  		return nil
  	}
  
  	status := n.Status()
  	return &api.Version{Index: status.Commit}
  }
docs: // GetVersion returns the sequence information for the current raft round.