code: func (s *Snapshot) Services(node string) (memdb.ResultIterator, error) {
  	iter, err := s.tx.Get("services", "node", node)
  	if err != nil {
  		return nil, err
  	}
  	return iter, nil
  }
docs: // Services is used to pull the full list of services for a given node for use
  // during snapshots.