Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
    assertThrows(IllegalArgumentException.class, () -> converter.convert("xxx"));
  }

  public void testStringConverter_reverse() {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
    assertEquals("CHEETO", converter.reverse().convert(TestEnum.CHEETO));