code: func (g GroupCount) Compare(o GroupCount) int {
  	for i := range g.Group {
  		if g.Group[i].RowID < o.Group[i].RowID {
  			return -1
  		}
  		if g.Group[i].RowID > o.Group[i].RowID {
  			return 1
  		}
  	}
  	return 0
  }
docs: // Compare is used in ordering two GroupCount objects.