I have defined many symbols in Sketch which contain layers that I've made exportable. When I use those symbols in an artbort, Sketch does not allow me to export the contained exportable layers from there. That would be really great, especially when using overrides in the symbols; all layers of the symbol would be exported, respecting the overrides of the instance. Is there an easy way to achieve this with a script? I'm a developer, but have never written a Sketch script. I't would be great to know if it is possible before I dive into the API.