public void verify(String dbPath) {
   EmbeddedGraphDatabase graphDb = new EmbeddedGraphDatabase(dbPath);
   assertEquals(
       "Reference node did not have zero relationships.",
       0,
       IteratorUtil.count(graphDb.getReferenceNode().getRelationships()));
   assertEquals("There was more than one node.", 1, IteratorUtil.count(graphDb.getAllNodes()));
   graphDb.shutdown();
 }
 public Iterable<Node> getAllNodes() {
   return inner.getAllNodes();
 }