MyViewModel.kt

// Bad practice
class MyViewModel() {
    fun example() {
        // ------------------ code smell ---------
        viewModelScope.launch(Dispatchers.IO) { … } 
    }
}

// Inject Dispatchers as shown below!

class MyViewModel(private val ioDispatcher: CoroutineDispatcher): ViewModel() {
    fun example() {
        // ------------------ good practice -----
        viewModelScope.launch(ioDispatcher) { … } 
    }
}