use become() from Java

I'm using Akka from Java. According to documentation, context.become() takes Procedure<Object> as a parameter. In fact, it expects PartialFunction<Object, BoxedUnit> which appears to be something auto-generated with lot's of methods with strange names.

What is the right way of using become() from Java?

PS i'm using Akka 2.0.3

Update: Looks like that there are two methods: context() and getContext(). The first one returns ActorContext, and the second one returns UntypedActorContext. UntypedActorContext has become(Procedure<Object>).