indeed I don't think it makes that much sense to use FQNs inside a template. so when in doubt I think it makes sense to use a specialized twig function instead. I think these specialized functions can go into this twig extension. 

the question then is how do we want to handle missing classes? that being said I just noticed that we are already not properly handling the PHPCR ODM  dependency. I will try to figure out a solution right now.