}

  private abstract static class DefaultValueChecker {

    private final Map<Integer, Object> arguments = Maps.newHashMap();

    @CanIgnoreReturnValue
    final DefaultValueChecker runTester() {
      new NullPointerTester().testInstanceMethods(this, Visibility.PACKAGE);
      return this;
    }

    final void assertNonNullValues(Object... expectedValues) {