KongaTreeNode root = new DefaultKongaTreeNode("root", true);
KongaTreeNode operations = new DefaultKongaTreeNode(root, EntityType.Operation.getPlural(), true);
operations.addChild(operationNode);
KongaTreeNode transformations = new DefaultKongaTreeNode(root, EntityType.Transformation.getPlural(), true);
transformations.addChild(transformationNode);
return new DefaultKongaTreeModel(root);
}