Inconsistent documentation on how to use AsyncTasks

The documentation found here may be out of date:
https://docs.unrealengine.com/latest/INT/API/Runtime/Core/Async/FAsyncTask/index.html

From Lauren R:
"Looking at P4, that example code is mostly from 2012, so it's possible that it's out of date. It's pulled directly from the source code, though, so the Jira task should probably go to Core team."

Inconsistent documentation on how to use AsyncTasks