Why Should You Wrap LiveData With Your Own Abstraction - use directly

Observer.kt

private val backgroundColorLiveData = MutableLiveData<Int>()

override fun observeTitleBackgroundColorWithDefaultValue(lifecycle: Lifecycle, observer: (Int) -> Unit) {
  observer(R.color.colorAccent)
  backgroundColorLiveData.observe({lifecycle}) {
    it?.let(observer)
  }
}