// Genre
AppleGenreBox genre = getOrNull(apple, AppleGenreBox.class);
addMetadata(XMPDM.GENRE, metadata, genre);
// Year
AppleRecordingYear2Box year = getOrNull(apple, AppleRecordingYear2Box.class);
if (year != null) {
metadata.set(XMPDM.RELEASE_DATE, year.getValue());
}
// Track number
AppleTrackNumberBox trackNum = getOrNull(apple, AppleTrackNumberBox.class);
if (trackNum != null) {