Facebook has a tool that learns to fix bugs automatically?

Direct link to official blog post: <a href="https:&#x2F;&#x2F;code.fb.com&#x2F;developer-tools&#x2F;getafix-how-facebook-tools-learn-to-fix-bugs-automatically&#x2F;" rel="nofollow">https:&#x2F;&#x2F;code.fb.com&#x2F;developer-tools&#x2F;getafix-how-facebook-too...</a>

If you have alot of copy pasted code this might work great if you fixed a bug in one place but not the 219 other ones.

TL;DR, this is a tool that automatically adds &quot;if (xx == null) return false&quot; before code potentially throwing NullPointerExceptions.

Who fixes Getafix then?