add curvature lines

[Batis007]

Hello,

I have been testing your example (https://plotly.com/r/network-graphs/) and everything works perfectly.
However it would be nice to add some curvature to the lines between nodes (similar to other edge bundling plots)
I have a big dataset (+700 nodes) and some angle to curve the lines would make it easy to visualize the plot.
But I'm not sure how can be done with plotly?