On the page for UITableLayout, the example images that show how to use it and what the result looks like are missing:
Inspecting the source, the page looks to be loading these two images but they are returning HTTP 403 errors.
/assets/bltad6d3e2ee82def82/UITableLayout_Hierarchy.png
/assets/bltff6ce5d154eee764/UITableLayout_Padding.png