public BetaNode build() {
NodeFactory nFactory = buildContext.getComponentFactory().getNodeFactoryService();
EntryPointNode epn = nFactory.buildEntryPointNode(buildContext.getNextId(),
buildContext.getRuleBase().getRete(),
buildContext);
epn.attach(buildContext);
ObjectTypeNode otn = nFactory.buildObjectTypeNode(buildContext.getNextId(),
epn,
new ClassObjectType(leftType),
buildContext);