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For #182
https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/util/Stack.html
Suggested replacement is Deque, introduced in Java 6
Can I suggest adding some formatting config/automatic formatting so i don't have to manually satisfy checkstyle pedantic requirements.
Also, I couldn't build the annotation module - set to source/target Java 6 - until I change this to Java 8.