protected virtual void AttachCaseToObject(Node <Case> node, SujetObserveAbstrait obj)
 {
     if (obj != null)
     {
         obj.Attach(node.Value);
     }
 }
 protected virtual void AttachCaseToObject(Node<Case> node, SujetObserveAbstrait obj)
 {
     if (obj != null) obj.Attach(node.Value);
 }