sealed class Action { 
object btn1Action: Action()
object btn2Action: Action()
}

class viewModel: ViewModel { 
events: MutableLiveData<Action> =  MutableLiveData()

fun actionOneClick() {
events.value = btn1Action
}

fun actionTwoClick() {
event.value = btn2Action
}
}

class theView: Fragment {
...
fun attachObserver() {
viewmodel.events.observe {
when (it) {
atn1Event -> Do Action 1 event
atn2Event -> Do Action 2 event

}
}
}

...
}