super(findHeading(subTitle), parentReference);
}
private static String findHeading(SUBTITLE subTitle) {
final CfrContentContainer content = new CfrContentContainer();
final HD hd = subTitle.getHD();
if (hd == null) {
final String alternativeText = subTitle.getRESERVED();
if (alternativeText == null) {
throw new RuntimeException("Could not find a header text for subtitle");
}