BaseViewModel.kt

abstract class BaseViewModel<UI_STATE : Parcelable, PARTIAL_UI_STATE, EVENT, INTENT>(
    (...)
) : ViewModel(),
    IntentDelegate<INTENT, PARTIAL_UI_STATE> by IntentDelegateImpl(),
    InternalChangesDelegate<PARTIAL_UI_STATE> by InternalChangesDelegateImpl(),
    EventDelegate<EVENT> by EventDelegateImpl() {

    init {
        viewModelScope.launch {
            merge(
                getIntents(::mapIntents),
                getInternalChanges(),
            )
                .scan(uiState.value, ::reduceUiState)
                .catch { Timber.e(it) }
                .collect {
                    savedStateHandle[SAVED_UI_STATE_KEY] = it
                }
        }
    }
}