final BindingsFactory bindingsFactory= BindingsFactory.createBindingsFactory(CommonCoreQueryEvaluator.getAllVariablesOfQuery(root));
root.sendMessage(new BindingsFactoryMessage(bindingsFactory));
// evaluate subgraph!
root.sendMessage(new StartOfEvaluationMessage());
root.startProcessing();
root.sendMessage(new EndOfEvaluationMessage());
if (instanceClass != null) {
Bindings.instanceClass = instanceClass;
}