public Advertisement addAdvertisement(Advertisement advertisement) {
getAdvertisements().add(advertisement);
advertisement.setCategory(this);
return advertisement;
}
public Advertisement removeAdvertisement(Advertisement advertisement) {
getAdvertisements().remove(advertisement);
advertisement.setCategory(null);
return advertisement;
}
public Advertisement addAdvertisement(Advertisement advertisement) {
getAdvertisements().add(advertisement);
advertisement.setPlace(this);
return advertisement;
}