RenderingModelImpl has apparently been fixed to use generics correctly ('implements RenderingModel<RD>' instead the former 'implements RenderingModel'), but now we run into problems with other Magnolia class which don't use generics.

For instance we have a class of our own which 'extends RenderingModelImpl<Paragraph> implements CssSelectorSupportRenderingModel', but since CssSelectorSupportRenderingModel 'extends RenderingModel' we get compilation errors.

Please use generics consistently to avoid these problems.