@Override
public void query(
final String term,
final int page,
final com.vaynberg.wicket.select2.Response<ObjectAdapterMemento> response) {
final List<ObjectAdapterMemento> mementos = Lists.newArrayList(obtainMementos(term));
// if not mandatory, and the list doesn't contain null already, then add it in.
if (!scalarModel.isRequired() && !mementos.contains(null)) {
mementos.add(0, null);
}
response.addAll(mementos);
}
private void setRequiredIfSpecified() {
final ScalarModel scalarModel = getModel();
final boolean required = scalarModel.isRequired();
entityLink.setRequired(required);
}