MainActivity.kt

class MainActivity: AppCompatActivity(), HasSupportFragmentInjector {
    @Inject
    lateinit var dispatchingAndroidInjector: DispatchingAndroidInjector<Fragment>

    override fun supportFragmentInjector() = dispatchingAndroidInjector

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }
}