Several Stacked Graphs?

Is there an easy way to do a cross between the two demos:

http://docs.webix.com/samples/08_chart/06_bar_chart/05_stacked_chart.html

http://docs.webix.com/samples/08_chart/06_bar_chart/06_series.html

As in stacking graphs but having multiple of them at a single x axis value.

As far as I can see - it is not possible

Ah that’s a shame. I get that it doesn’t fit the chosen data model well and you can’t be everything to everyone but it would be quite cool.