$this->responseCreated() method not found

I was listening this to tutorial about shield and api: https://www.youtube.com/watch?v=0sdbsbOW...G&index=31

At 10:05 the author uses $this->respondCreated(). I am using CI 4.5.1 I cannot see that method. I also do not see it in the documentation. Was that some previous version of am I missing something?

Thank you for your help!