public void batchUnrelate(boolean notifyChanges) {
   NonRootModelElement inst = null;
   // R301
   // DIM_GE
   inst = IsSupertypeGraphelement;
   unrelateAcrossR301From(IsSupertypeGraphelement, notifyChanges);
   if (inst != null) {
     inst.removeRef();
   }
 }
 public void unrelateAcrossR301From(Graphelement_c target) {
   unrelateAcrossR301From(target, true);
 }