In the Java editor the "(O)" icon in the left gutter has a tooltip that shows which classes override the methods.
Or at least I thought it does that.
However that tooltip can be wrong and JetBrains argued that this is not-a-bug.
The tooltip may or may not show a class depending on the current temperature in Haiti.
So DO NOT RELY ON THE INFORMATION IN THE TOOLTIP.
Apparently if the result is fast enough, it is deemed irrelevant wether it is also correct:
Closed with "Won't Fix"