svoid test_retireClassLoader() {
  Class c = hotwire(#1004816); // hotwire random stuff
  assertFalse(loadedByRetiredClassLoader(c));
  assertTrue(contains(nonRetiredMainClasses(), c));
  retireClassLoader(getClassLoader(c));
  assertTrue(loadedByRetiredClassLoader(c));
  assertFalse(contains(nonRetiredMainClasses(), c));
}