NodeForPath
virtual void* NodeForPath(const TreeTablePath& path) const;
ModelNode* node = (ModelNode*)NodeForPath(path);
ModelNode* node = (ModelNode*)fVariableTableModel->NodeForPath(path);
ModelNode* node = (ModelNode*)fVariableTableModel->NodeForPath(path);
ModelNode* node = (ModelNode*)fVariableTableModel->NodeForPath(path);