Is custom_shaders implemented?

Hey there! I noticed when exporting the default vital theme, there’s a variable labeled “custom_shaders”.
Is this something that is implemented, as in I could write a shader to change the rendering of Vital? Or am I completely misinterpreting the file?

I would love to know how to use it if it is functional, though. Sadly I didn’t find anything when searching around.

That’s there for a future version and doesn’t do anything at the moment.