final SimpleComboBox<AccessLevel> accessLevelCombo = new SimpleComboBox<AccessLevel>();
accessLevelCombo.setForceSelection(true);
accessLevelCombo.setEditable(false);
accessLevelCombo.setTriggerAction(TriggerAction.ALL);
accessLevelCombo.add(Arrays.asList(AccessLevel.values()));
CellEditor accessLevelEditor = new CellEditor(accessLevelCombo)
{
@Override
public Object preProcessValue(Object v)
{
if (v instanceof AccessLevel)