if (year != null) {
metadata.set(XMPDM.RELEASE_DATE, year.getValue());
}
// Track number
AppleTrackNumberBox trackNum = getOrNull(apple, AppleTrackNumberBox.class);
if (trackNum != null) {
metadata.set(XMPDM.TRACK_NUMBER, trackNum.getA());
//metadata.set(XMPDM.NUMBER_OF_TRACKS, trackNum.getB()); // TODO
}
// Disc number
AppleDiskNumberBox discNum = getOrNull(apple, AppleDiskNumberBox.class);