Is it possible to search Vertex properties with a contains in Azure Cosmos Graph DB?

For example, I would like to find all persons which have `'Jr'` in their name?

```
g.V().hasLabel('person').has('name',within('Jr')).values('name')

```

Seems like the `within('')` function only filters values that are exactly equal to `'Jr'`. I am looking for a contains. **Ideally case insensitive.**