code: func (c *MemoryGroupService) GroupMembers(ctx context.Context, groupName string) ([]string, error) {
  	memoryGroupsMu.Lock()
  	defer memoryGroupsMu.Unlock()
  
  	mg, ok := memoryGroups[groupName]
  	if !ok {
  		return nil, constants.ErrGroupNotFound
  	}
  
  	uids := make([]string, len(mg.Uids))
  	copy(uids, mg.Uids)
  
  	return uids, nil
  }
docs: // GroupMembers returns all member's UID in given group