ProductViewModel.kt

@HiltViewModel
class ProductDetailViewModel @Inject constructor(
    private val savedStateHandle: SavedStateHandle,
  ...
) : ViewModel() {

...

    private fun getProductFromArgs(): ProductDetailArgs {
        return ProductDetailArgs(
            productId = savedStateHandle.get("productId")?:"",
            productParentId = savedStateHandle.get("productParentId")
        )
    }

}