* that the test of {@code Multisets.forSet()} can suppress them.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static List<Method> getElementSetDuplicateInitializingMethods() {
    return asList(
        getMethod(
            MultisetElementSetTester.class, "testElementSetRemoveDuplicatePropagatesToMultiset"));
  }