google-app-engine - PlayFramework+GAE+Siena using Datastore and Cloud SQL simultaneously

Question

Does anyone knows if is there way to use Datastore and Cloud SQL in GAE application simultaneously (PlayFramework 1.2.7 with GAE plugin).

E.g.

@Table("sometable1")
class Model1 extends siena.Model{}

@Table("sometable2")
class Model2 extends siena.Model{}

I want to make possible to store Model1 to Cloud SQL (via Siena), and Model2 to Datastore (also via Siena)

Does anybody faced such problem?