Dependency Viewer does not find UI Toolkit dependencies #54
Description
Issue:
When looking at Used By dependencies inside the Dependency Viewer the package does not find references which have been made in UI Toolkit uxml UI Documents (and uss files probably too).
An asset that manages to do this is Asset Usage Detector from the Asset Store, but that asset is quite a bit slower and less well integrated.
Expectation:
search extensions and dependency viewer should be compatible with at least all Unity built in files and asset dependencies.
thx
