title: RecyclerView - Difference between computeHorizontalScrollRange and computeHorizontalScrollExtent?
body: <p>RecyclerView is powerful, but it's features aren't well documented. I've been trying to compute the "total scrollable area" within an inflated RecyclerView and found my luck with this expression = </p>
  
  <pre><code>"recyclerView.computeHorizontalScrollRange() - recyclerView.computeHorizontalScrollExtent()"
  </code></pre>
  
  <p>But I don't really understand what exactly computeHorizontalScrollRange() does and what computeHorizontalScrollExtent() does. Any help will be appreciated, thank you!</p>