Optimizing ViewModel with Lifecycle 2.2.0: Passing Arguments/Parameters with SavedState

CustomViewModelFactory.kt

class SomeViewModelFactory(
        private val owner: SavedStateRegistryOwner,
        private val someString: String) : AbstractSavedStateViewModelFactory(owner, null) {
    override fun <T : ViewModel?> create(key: String, modelClass: Class<T>, state: SavedStateHandle) =
            SomeViewModel(state, someString) as T
}

class Fragment: Fragment() {
    // Create VM in activity/fragment with VM factory.
    val someViewModel: SomeViewModel by viewModels { SomeViewModelFactory(this, "someString") } 
}

class SomeViewModel(private val state: SavedStateHandle, private val someString: String) : ViewModel() {
    init {
        //TODO: Use 'someString' to init process when VM is created. i.e. Get data request.
    }
}