orm.go
func (f *Field) RowsLimit(limit int64) *PQLRowsQuery {
	if limit < 0 {
		return NewPQLRowsQuery("", f.index, errors.New("rows limit must be non-negative"))
	}
	text := fmt.Sprintf("Rows(field='%s',limit=%d)", f.name, limit)
	return NewPQLRowsQuery(text, f.index, nil)
}
func (f *Field) RowsLimit(limit int64) *PQLRowsQuery {
	if limit < 0 {
		return NewPQLRowsQuery("", f.index, errors.New("rows limit must be non-negative"))
	}
	text := fmt.Sprintf("Rows(field='%s',limit=%d)", f.name, limit)
	return NewPQLRowsQuery(text, f.index, nil)
}
// RowsLimit creates a Rows query with the given limit