At first I want to make clear terms.

There is custom value types which usually contains internal type of entity (I don't know if there is "official" term for that type).

So. On code generation if my internal type is internal class of custom value type (ok, I just want to not clutter my space with classes) then generated classes contains variables as Class1$Class2 whereas they should be Class1.Class2.

make a failing test case for it and add it to JIRA