Example of a View Class observing Sealed Class LiveData from ViewModel

SealedClassObserver.kt

    val viewModel: AuthViewMode by viewModels()
    
    private fun observeState() {
        viewModel.state.observe(
            this,
            { uiState ->
                handleUiState(uiState)
            }
        )
    }

    private fun handleUiState(uiState: UIState<Int>?) {
        when (uiState) {
            is UIState.Loading -> {
                showProgress(uiState.loadingMessageId)
            }
            is UIState.Success -> {
                dismissProgress()
                finish()
            }
            is UIState.Error -> {
                dismissProgress()
                showSnackBar(uiState.errorMessageId)
            }
            // the `else` clause is not required because all the cases are covered
        }
    }