What's the latest on saving a bokeh plot as a headless (png, svg) image, e.g. using nbconvert?

[Paul]

Is there a branch with a working example that can be looked at?

https://github.com/bokeh/bokeh/pull/3867

Headless static (svg, png) image generation

https://github.com/Anaconda-Platform/nbpresent/pull/16/commits/57031ee71a0b524e2c8a96bd44edc9b653e2a890