@Serializable
data class MyUiState(
    // Persistent
    val data: List<String> = emptyList(),
    val selectedItem: String? = null,
    // Transient
    val isLoading: Boolean = false,
    val error: String? = null
)

class MyViewModel(private val savedStateHandle: SavedStateHandle) : ViewModel() {

    // Define which properties are transient
    private val transientProps = listOf("isLoading", "error")

    // Declare your state flow - Reanimator handles the rest!
    private val _uiState by savedStateHandle.getMutableStateFlow(
        defaultValue = MyUiState(),      // Initial/default state
        coroutineScope = viewModelScope, // Scope for saving changes
        transientProperties = transientProps // What NOT to save
        // key = "custom_state_key" // Optional: custom key
    )
    val uiState: StateFlow<MyUiState> = _uiState.asStateFlow()

    // ... rest of your ViewModel logic ...

    fun updateData(newData: List<String>) {
        // Just update the state - Reanimator saves persistent parts automatically
        _uiState.update { it.copy(data = newData, isLoading = false) }
    }
}