class SomeComponent(
    componentContext: ComponentContext
) : ComponentContext by componentContext {
    private val lifeCycleObserver: Lifecycle.Callbacks = object : Lifecycle.Callbacks {
        // listen to onCreate, onStart, onPause, onResume, onStop, onDestroy
    }

    init {
        lifecycle.doOnCreate {
            lifecycle.subscribe(lifeCycleObserver)
        }

        lifecycle.doOnDestroy {
            lifecycle.unsubscribe(lifeCycleObserver)
        }
    }
}

lifecycle.doOnCreate {}

abstract class AComponent(
    componentContext: ComponentContext
) : Lifecycle.Callbacks, ComponentContext by componentContext {
    init {
        lifecycle.subscribe(this)
    }

    override fun onCreate() {
    }

    override fun onDestroy() {
    }

    override fun onPause() {
    }

    override fun onResume() {
    }

    override fun onStart() {
    }

    override fun onStop() {
    }
}

init

Lifecycle.Callbacks

lifecycle.subscribe(this)

init