AFAIU you have to align GraphicalNodeEditPolicy behaviour with the modified
NodeItemSemanticEditPolicy. In particular, getView() method of GraphicalNodeEditPolicy
installed on source/target NClass should return notation model elements referencing
corresponding Life Node instead of current implementation returning notation
model element for source/target NClass. I suggest to patch this method only
for the request creating NMessage link +IBM- default implementation should be
used for the rest of requests.