@Override
public GenreId save(Genre genre) {
final Genre saveGenre;
if (genre.getId() == null || !genre.isRegistered()) {
saveGenre = new Genre(new GenreId(sequence), genre.getName());
sequence++;
} else {
saveGenre = genre;
}
genreMap.put(saveGenre.getId().getValue(), saveGenre);
return saveGenre.getId();
}
