This could help pack makers with organization of textures and objects. The textures/objects would load based on the jsondef file location. For instance, if there would be a sign_gasstation_price.json file in the jsondefs.poles.gasstation folder, it would firstly try to find the texture in textures.poles.gasstation and if it wouldn't find the texture, it would try the default folder textures.poles, the same would be for objects.

Implemented in 19.4.0. See the new pack-loading system where you use a JSON file and specify the folder structure. Handbook section 2.0.