Accessing GWT reflected classes cache in LibGDX application

Is there a way to access the whole cache of GWT-reflected classes? I have checked ReflectionCache and IReflectionCache in GWT LibGDX back-end classes, but they do not seem to have direct access to the classes' collection. Basically, I want to do something similar to a component scan (finding all classes with specific annotations, without actually registering them anyway before) and I'm having trouble accessing all (reflected) classes used by the application.