Inheriting from classes with appended lists

[Sven Brauch]

Hi,

sorry for bringing up that topic once again, but my problem there
still isn't solved.

The issue is easily described: I want to create my own
FunctionDeclaration which adds an appended list to the data class.
However, KDevelop::FunctionDeclarationData does already use appended
lists.
How can I add another one? I didn't find an example for that case
anywhere. The "canonical" way of doing it doesn't seem to work
(produces a lot of crashes).

Greetings,
Sven