code: func decodeRow(pr *internal.Row) *pilosa.Row {
  	if pr == nil {
  		return nil
  	}
  
  	r := pilosa.NewRow()
  	r.Attrs = decodeAttrs(pr.Attrs)
  	r.Keys = pr.Keys
  	for _, v := range pr.Columns {
  		r.SetBit(v)
  	}
  	return r
  }
docs: // DecodeRow converts r from its internal representation.