PostListActivity.kt

private val loadFeature by lazy { Posts.init() }
private fun injectFeature() = loadFeature

class PostListActivity : AppCompatActivity() {

    private val vm: PostListViewModel by viewModel()

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

        injectFeature()
        //...
    }
}