title: What is the difference between `lineFragmentRect` and `lineFragmentUsedRect`?
body: <p>What is the difference between <a href="https://developer.apple.com/documentation/uikit/nslayoutmanager/1403140-linefragmentrect" rel="nofollow noreferrer"><code>NSLayoutManager.lineFragmentRect</code></a> and <a href="https://developer.apple.com/documentation/uikit/nslayoutmanager/1403193-linefragmentusedrect" rel="nofollow noreferrer"><code>NSLayoutManager.lineFragmentUsedRect</code></a>?</p>