DOMDataTreeChangeListener listener = mock(DOMDataTreeChangeListener.class);
shardDataTree.registerTreeChangeListener(CarsModel.CAR_LIST_PATH.node(CarsModel.CAR_QNAME), listener,
- com.google.common.base.Optional.absent(), noop -> { });
+ Optional.empty(), noop -> { });
addCar(shardDataTree, "optima");