unfortunately no success till now ...
only way to achieve this was:
- instead of extending Archimate (or other) MDG, original UML element (i.e. Class) was extended first with own MDG stereotype (i.e. Service Consumer), and then added ALL the rest from the Archimate element (i.e. Business Actor)
- and then created QuickLink artifact, listing first own elements, and then, in sequence, adding the elements from the original Archimate ...
It works, but it is not easy maintainable, you have to reverse engineer everything from Archimate, and on the end you do not have Archimate any more, but only your MDG that is not Archimate extension, but only your own Archimate-like MDG ...
maybe in the future somebody finds the way how to do it in the simple way ...
rgrds,
ljk