How can I get a current item in `RecycerView`? In my use-case RV item takes all screen space, so there is only one item at a time. 
I've tried to google before, but nothing helpful was found.

**The whole use case:**

1. UI. The bottom navigation has a button that should call a certain method (let's say a `foo()` method) in fragment
2. this `foo()` method should get a visible item from the adapter and call a specific method in a presenter.