There is no way to add border around the bar chart

[gauravr7]

Is your feature request related to a problem? Please describe.
There is no way to add border around the bar chart, I have checked almost all things from the documentation.
Also I am also trying to overlap 2 bar data onto each other which is also not working perfectly when I tried to set a negative padding value.

Describe the solution you'd like
I think there should be a way to add borders around the chart.

Describe alternatives you've considered
enableGridX:true
enableGridY:true

Additional context
Design that I have:

Chart created using NiVO:

[plouc]

Overlapping bars is not supported.