assertEquals("Data node", testNode, optional.get());
// 6. Create a new RW Tx from the chain, write more data,
// and ready it
final DOMStoreReadWriteTransaction rwTx = txChain.newReadWriteTransaction();
final MapNode outerNode = ImmutableNodes.mapNodeBuilder(TestModel.OUTER_LIST_QNAME)
assertEquals("Data node", testNode, optional.get());
// 6. Create a new RW Tx from the chain, write more data,
// and ready it
final DOMStoreReadWriteTransaction rwTx = txChain.newReadWriteTransaction();
final MapNode outerNode = ImmutableNodes.mapNodeBuilder(TestModel.OUTER_LIST_QNAME)