public void copyParentFeatures()
 {
     this.multiset = ParentKPInstance.Multiset.Clone();
     PItem.CopyProperties(ParentKPInstance, this);
     LabelledPItem.CopyLabels(ParentKPInstance, this);
     this.Connections = ParentKPInstance.Connections;
     //add itself to connection list of target instances
     foreach (MInstance targetInstance in Connections)
     {
         if (!targetInstance.Connections.Contains(this))
         {
             targetInstance.Connections.Add(this);
         }
     }
 }