How to retrieve facetsStats?

I've tried many ways to get the facetsStats of say "price" attribute (in order to get the highest price) but non works. It seems like a bug or does any one know how to do it?

What I did:
```
SearchState(
facets: ['searchable(price)','price']
...)
```

Start by reproducing the issue with the shown SearchState configuration for the price facet and trace how facetsStats is exposed. Compare the observed result with the expected highest-price behavior; done means either facetsStats can be retrieved for price or the limitation and correct usage are documented.

Written by the indexing model from the issue text.