@Override
    public SourceVersion getSupportedSourceVersion() {
      return SourceVersion.latest();
    }
The types that we will compile and then recreate. They are referenced in a context where {@code
Set} is unambiguous but not {@code List}, which allows us to test the placement of annotations
in unqualified types like {@code Set<T>} and qualified types like {@code java.util.List<T>}.
value/src/test/java/com/google/auto/value/processor/SimplifyWithAnnotationsTest.java