RxCommand with double context extension pattern

Main.kt

interface HasDisposables {
    
    fun Disposable.autoDispose()
    
    fun dispose()
    
    companion object {
        
        operator fun invoke(): HasDisposables = object : HasDisposables {
            private val disposables = CompositeDisposable()

            override fun Disposable.autoDispose() {
                disposables.add(this)
            }

            override fun dispose() {
                disposables.clear()
            }
        }
    }
}

val HasDisposables.subscribeWithAutoDispose: RxCommand<NoParameter>.(() -> Unit) -> RxCommand<NoParameter>
    get() = { onNext ->
        apply { subscribe { onNext() }.autoDispose() }
    }

class SomeViewModel : HasDisposables by HasDisposables() {
    
    val command: RxCommand<NoParameter> = RxCommand<NoParameter>().subscribeWithAutoDispose {
        // command action
    }
}