Kotlin: RecyclerView assign on scroll to end listener

AndroidUtils.kt

fun RecyclerView.onScrollToEnd(linearLayoutManager: LinearLayoutManager, onScrollNearEnd: (Unit) -> Unit)
        = addOnScrollListener(object : RecyclerView.OnScrollListener() {
    override fun onScrolled(recyclerView: RecyclerView?, dx: Int, dy: Int) {
        if (linearLayoutManager.childCount + linearLayoutManager.findFirstVisibleItemPosition()
                >= linearLayoutManager.itemCount - 5) {  //if near fifth item from end
            onScrollNearEnd(Unit)
        }
    }
})

Can you show me a example usage of this?

kotlin beginner: would love to see an example of how this could be used..

All that you have to do is, add the listener to the recyclerView (same place where you set the recyclerView itself, ie: onCreateView), something like ...
YOUR_RECYCLER_VIEW.onScrollToEnd(linearLayoutManager) { THE_FUNCTION_YOU_WANT_TO_CALL() }
If you just need to call a function at the end of the scroll, you don't even need to pass the LinearLayoutManager. You can change the listener to:

fun RecyclerView.onScrollToEnd(
  onScrollNearEnd: (Unit) -> Unit
  ) = addOnScrollListener(object : RecyclerView.OnScrollListener() {
      override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
        if (!YOUR_RECYCLER_VIEW.canScrollVertically(1)) {
          onScrollNearEnd(Unit)
            }
        }
    })