MyViewModelBuilder.kt

package myapp.di

import androidx.lifecycle.ViewModel
import dagger.Binds
import dagger.Module
import dagger.multibindings.IntoMap
import myapp.di.MyAppViewModel
import myapp.di.annotations.ViewModelKey

@Module
@Suppress("unused")
abstract class MyViewModelBuilder {

    @Binds
    @IntoMap
    @ViewModelKey(MyAppViewModel::class)
    internal abstract fun myappViewModel(viewModel: MyAppViewModel): ViewModel

}