/** @see IModelClassInspector#getParent(Object) Returns the parent(s) of this node */
 public Object getParent(Object arg) {
   Sequence_c result1 =
       Sequence_c.getOneSQ_SOnR929(
           InteractionParticipant_c.getOneSQ_POnR930((FunctionPackageParticipant_c) arg));
   if (result1 != null) {
     return result1;
   }
   Communication_c result2 =
       Communication_c.getOneCOMM_COMMOnR1126(
           ParticipantInCommunication_c.getOneCOMM_PICOnR1126(
               InteractionParticipant_c.getOneSQ_POnR930((FunctionPackageParticipant_c) arg)));
   if (result2 != null) {
     return result2;
   }
   return null; // No parent found
 }