public SingleSynonymCatalogPropertyWidget(ConfiguredPropertyDescriptor propertyDescriptor,
AbstractBeanJobBuilder<?, ?, ?> beanJobBuilder, ReferenceDataCatalog referenceDataCatalog) {
super(beanJobBuilder, propertyDescriptor);
_comboBox = new JComboBox();
_comboBox.setRenderer(new ReferenceDataComboBoxListRenderer());
_comboBox.setEditable(false);
if (!propertyDescriptor.isRequired()) {
_comboBox.addItem(null);
}