@Override
protected void doSetValue(Object source, Object value) {
Container container = (Container) source;
@SuppressWarnings("unchecked")
Collection<Object> itemIds = (Collection<Object>) value;
for (Object id : container.getItemIds().toArray()) {
container.removeItem(id);
}
for (Object id : itemIds) {
container.addItem(id);
}
}
