Hi! I'm reading <this> article re: disposables (no...

# android

[iex]

Hi! I'm reading this article re: disposables (not an rx specific question, so asking here). The snippet in question:

abstract class DisposingViewModel : ViewModel() {
    private val compositeDisposable = CompositeDisposable()
    fun addDisposable(disposable: Disposable) {
        compositeDisposable.add(disposable)
    }
    override fun onCleared() {
        compositeDisposable.clear()
    }
}

(the idea is having view models extending DisposingViewModel so they don't have to repeat this boilerplate)
Author says then

If you are against the idea of inheritance being used in this way (you aren’t alone) then it’s worth noting that creating a solution for this using class delegation in Kotlin is not much more work.

I'm not very familiar with (idiomatic) delegation. I read that I've to add by to the class, but failing to see how to apply that to this case