Screenshot

I have been trying, and failing to figure out where this is used in either the website or on a running instance.
https://github.com/higlass/higlass-server/blob/a2c70031a9bfaae55019e6b807ca0fde956674b2/website/views.py#L131
I want to use the same python method of screenshots, since the js one from hglib.js won't allow files to be generated outside of the downloads folder for security reasons.

Could you please point me in the right direction?

Thanks!