// used classes
class MyRepository()
class MyViewModel(val repository : MyRepository) : ViewModel()

// module
val myModule : Module = applicationContext {

    // ViewModel instance of MyViewModel
    // get() will resolve Repository instance
    viewModel { MyViewModel(get()) }
    // or even (with builder API)
    viewModel<MyViewModel>()

    // Single instance of Repository
    single<Repository> { MyRepository() }
}

// Use directly your ViewModel
class MyActivity : AppCompatActivity(){

    // Lazy inject MyViewModel
    val model : MyViewModel by viewModel()

    override fun onCreate() {
        super.onCreate()

        // or direct retrieve instance
        val model : MyViewModel = getViewModel()
    }
}