public void batchUnrelate(boolean notifyChanges) {
   NonRootModelElement inst = null;
   // R1013
   // MSG_A
   inst = IsSupertypeMessageArgument;
   unrelateAcrossR1013From(IsSupertypeMessageArgument, notifyChanges);
   if (inst != null) {
     inst.removeRef();
   }
 }
 public void unrelateAcrossR1013From(MessageArgument_c target) {
   unrelateAcrossR1013From(target, true);
 }