Slider argument in Layout missing #288

I am trying to animate plot and it seems sliders as an argument is not present. please include it in the next version.

please add sliders with a way to animate.

i tried picture perflecty to replicate this in rust: gapminder example

and ended up botching it up somewhere cuz everything except the pause button works normally...and i can't figure why pause button works

Thankyou.