public ChildTrackingVariableRowModel(IDebuggerService debuggerService, VariableDisplayManager variableDisplayManager,
                                      TrackingVariableRowModel parent, int offset)
     : base(debuggerService, variableDisplayManager)
 {
     _offset = offset;
     _parent = parent;
 }
        internal void OnNodesRemoved(TrackingVariableRowModel row)
        {
            if (NodesRemoved == null)
            {
                return;
            }

            NodesRemoved(this, new TreeModelEventArgs(TreePath.Empty, new object[] { row }));
        }