Is it possible to add Diff Charts

[mubashirqasim]

Hi there,

Thanks for your amazing work on this library.

I wonder if it is possible to create Diff Charts https://developers.google.com/chart/interactive/docs/gallery/diffchart using googleVis?

Cheers,

Mubashir

[mages]

I am sure it is possible, but I haven't got the time at the moment to look into this.