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kotlinlang

I'm rewriting some java class in kotlin and stuck at one place.
Type inference failed for return type of this method:
<https://github.com/ReactiveX/RxJava/blob/1.x/src/main/java/rx/functions/Actions.java#L32>

This code works in Java:
```
new ActionSubscriber(onNext, onError, Actions.empty());
```
but it doesn't work in Kotlin:
```
ActionSubscriber(onNext, onError, Actions.empty())
```
It cannot infer the type of `T0` which is actually `Action0` and doesn't work even if I specify it explicitly.
Any solutions/workarounds?