Access to shared components used in Layers
Is it possible to retrieve share components that are used in a layers/containers? I've previously found and hooked into versions of the functions below which have worked well but I'm hoping to move over the JS API soon and avoid the endless searching through header files for functions that solve my needs.
```javascript
layerStyles.sharedObjectsInLayer(...)
MSPasteboardLayersBase.usedSymbolsInContainer_document(...)
```