This shows up in one major codebase that migrated to JDK 17, which still uses Vector, and doing forEach on it. Current implementation of forEach is already synchronized:
https://github.com/openjdk/jdk/blob/50bed6c67b1edd7736bdf79308d135a4e1047ff0/src/java.base/share/classes/java/util/Vector.java#L1353

...but then it calls `elementAt`:
https://github.com/openjdk/jdk/blob/50bed6c67b1edd7736bdf79308d135a4e1047ff0/src/java.base/share/classes/java/util/Vector.java#L1359C27-L1359C36

...which is also synchronized:
https://github.com/openjdk/jdk/blob/50bed6c67b1edd7736bdf79308d135a4e1047ff0/src/java.base/share/classes/java/util/Vector.java#L464

Maybe bulk methods should really use `elementData`, not `elementAt`?