mutableStateFlow
fun <T> SavedStateHandle.mutableStateFlow(key: BundleKey<T, *>, scope: CoroutineScope, debounceWrites: Duration = Duration.ZERO): MutableStateFlow<T>
fun <T> TypedSavedStateHandle.mutableStateFlow(key: BundleKey<T, *>, scope: CoroutineScope, debounceWrites: Duration = Duration.ZERO): MutableStateFlow<T>
fun <T> SavedStateHandle.mutableStateFlow(key: AsyncBundleKey<T, *>, scope: CoroutineScope, debounceWrites: Duration = Duration.ZERO): MutableStateFlow<T?>
fun <T> TypedSavedStateHandle.mutableStateFlow(key: AsyncBundleKey<T, *>, scope: CoroutineScope, debounceWrites: Duration = Duration.ZERO): MutableStateFlow<T?>