Never explained how to deactivate AI movement

In unreal blueprint course # 68 it says to use the function we created called deactivate AI movement. but we’ve never created that. nor does it explain how to after or even show it. its just glossed over completely. its not even in previous videos. I have 4 videos left and I’m trying to finish this today
I’m guessing it was accidentally left out in editing or something. Because I cant find it anywhere even in the previous videos