Kotlin Coroutine Confidence: What's the IntelliJ IDEA inspection? (pg 133 & 141)

On page 133 in the callout text box, it says:

Did your IDE warn you about this misplaced Thread.sleep()? …

And on page 141 it says:

Have you been keeping an eye out for those IDE warnings? Tools like IntelliJ IDEA or Android Studio can identify the calls we’ve been making to Thread.sleep() and ImageIO.read(), and will let you know that you shouldn’t be using them in a suspending function. …

I’m not getting those warnings in IntelliJ IDEA, and I tend to keep my inspections configured pretty aggressively. And I don’t see them when I switch to the Default inspection profile. Can you tell me what inspection or inspections they are? (If you are not familiar with how to determine the name of the inspection generating a warning, let me know and I can respond with instructions.) Thanks!