tagless_activity.kt

class MainActivity : AppCompatActivity(), RepositoriesView {

    private val repoList: MutableList<Repository> = mutableListOf()
    lateinit var presenter: RepositoryPresenter<ForObservableK>

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

        setupList(repoList)

        presenter = initPresenter(ObservableK.async())
        presenter
            .drawRepositories()
            .fix()
            .observable
            .subscribe()
    }
}
private fun <F> initPresenter(async: Async<F>) =
    RepositoryDataSource(async, apiClient()) pipe { dataSource ->
        RepositoryUseCase(dataSource)
    } pipe { useCase ->
        RepositoryPresenter(useCase, this)
    }