External Types in Java are not propagated to UML

[SofiaAnanieva]

Types whose creation has not been recorded are not propagated to the UML model, which sounds like intended behaviour. However, this is a problem, if those types are referenced in the recorded model. This concerns in particular the types of the Java class library (e.g., java.lang.Object or java.util.Collection). In the UML model, references to those external types become null references.

As discussed in the latests Vitruv ConCall (October 28, 2021), a possible solution could be to create stubs (dummy types) for all referenced external types.