Node nAgain = node.getSession().getNodeByUUID(uuid);
assertTrue(nAgain.isSame(node));
assertTrue(nAgain.isSame(node.getSession().getNodeByIdentifier(uuid)));
Node childNode = node.addNode("boohoo");
childNode.addMixin(JcrConstants.MIX_REFERENCEABLE);
assertTrue(childNode.isNodeType(JcrConstants.MIX_REFERENCEABLE));
String childUuid = childNode.getUUID();
assertNotNull(childUuid);
assertEquals(childUuid, childNode.getIdentifier());