public static RuleDescriptionSectionDtoBuilder builder() {
    return new RuleDescriptionSectionDtoBuilder();
  }
@Test
  void setKey_whenDefaultAlreadySet_shouldThrow() {
    RuleDescriptionSectionDto.RuleDescriptionSectionDtoBuilder builderWithDefault = RuleDescriptionSectionDto.builder()
      .setDefault();
    assertThatExceptionOfType(IllegalArgumentException.class)
      .isThrownBy(() -> builderWithDefault.key("balbal"))
      .withMessage("Only one of setDefault and key methods can be called");
  }