index.add(n2, "timestamp", 123L);
Node n3 = db.createNode();
n3.setProperty("time", 124);
index.add(n3, "timestamp", 124L);
tx.success();
tx.finish();
tx = db.beginTx();
GraphvizWriter writer = new GraphvizWriter();
writer.emit(System.out, Walker.fullGraph(db));
IndexHits<Node> hits = index.get("timestamp", 123L);