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