public void prepare() {
ModulesBuilder builder = new ModulesBuilder().add(
new ScalarFunctionModule(),
new OperatorModule(),
new AggregationImplModule(),
new HighlightModule(),
new TestModule(),
new MetaDataModule());
Injector injector = builder.createInjector();
ImplementationSymbolVisitor implementationSymbolVisitor = new ImplementationSymbolVisitor(