// check persistent stats
HelixDataAccessor accessor = _helixManager.getHelixDataAccessor();
Builder keyBuilder = accessor.keyBuilder();
ZNRecord rec = accessor.getProperty(keyBuilder.persistantStat()).getRecord();
System.out.println("rec: " + rec.toString());
String persistentStat = "accumulate()(dbFoo.partition10.latency)";
AssertJUnit.assertTrue(statRecordHasValue(rec, persistentStat, "2.0"));
AssertJUnit.assertTrue(statRecordHasTimestamp(rec, persistentStat, "10.0"));