code: func (s *Store) GetCollectionNames() []string {
  	if s.collLock != nil {
  		s.collLock.RLock()
  		defer s.collLock.RUnlock()
  	}
  
  	// Clone our collection names slice.
  	if len(s.collNames) == 0 {
  		return nil
  	}
  	return append([]string(nil), s.collNames...)
  }
docs: // GetCollectionNames returns the names of the Collections in this Store, sorted
  // alphabetically.