viewmodel-inputs-side-effects.kt

private val viewState = MutableLiveData<ViewState>()
private var someUsefulVariable: Int? = null // mutable!

init {
  doStep1()
  //...
  .doStepK()
  .map { stepKResult -> 
        someUsefulVariable = ... // derived from stepKresult
        return@map processData(stepKResult, someUsefulVariable)
  }
  //...
  .handleResult { finalResult ->
                 viewState.value = ViewState.DataLoaded(...)
                }
}

internal fun onActivityResult() {
  //...
  someUsefulVariable = -1 // random value here, no particular meaning
}
internal fun onRefreshed() {
  //...
  someUsefulVariable = null // random value here, no particular meaning
}
internal fun onSomeButtonClicked() {
  //...
  someUsefulVariable = 0 // random value here, no particular meaning
}