see fiddle: https://jsfiddle.net/bm190ynd/
I'd like to be able to numerically sort the data within a group instead of within series. So for first group "A" I'd like it to be sorted to have the first value of series Z (0), first value of series X (20) and then first value of series Y (90).
Is it possible to sort this data without modifying the series itself? i.e. the legend colours stay the same