BorisFX Silhouette - Collapse Object List Script
I have wanted this feature for about 15 years. You know the feeling: a Silhouette roto project with hundreds of layers, and you need to collapse all the main layers to find something in the Object List. Now you can. Assign it to a keyboard shortcut and boom.
Because the Python API has no direct way to do this, I had to dig into the Qt/PySide UI to find the correct panel and trigger the layer-expansion action.