Q:

ViewModelFactory code room codelabs\

override fun <T : ViewModel?> create(modelClass: Class<T>): T {
   if (modelClass.isAssignableFrom(ScoreViewModel::class.java)) {
       return ScoreViewModel(finalScore) as T
   }
   throw IllegalArgumentException("Unknown ViewModel class")
}
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viewModel = ViewModelProviders.of(this, viewModelFactory)
       .get(ScoreViewModel::class.java)
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private lateinit var viewModel: ScoreViewModel
private lateinit var viewModelFactory: ScoreViewModelFactory
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class ScoreViewModelFactory(private val finalScore: Int) : ViewModelProvider.Factory {
}
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