I try to move an ontology (\*.owl file) into `neo4j` to do queries on it. I found some helpful information [here](http://blog.neo4j.org/2013/08/and-now-for-something-completely.html) but I am facing with issues in this line:

```
Node thingNode = getOrCreateNodeWithUniqueFactory("owl:Thing");

```

I don't know to which class the "`getOrCreateNodeWithUniqueFactory`" belongs. Is this available in some library or should I implement it by myself?

What am I missing here?