@Override
public void elementRemoved(ListEvent<CompanionFacade> e) {
String type = e.getElement().getCompanionType();
int index = Collections.binarySearch(types, type, Comparators.toStringIgnoreCaseCollator());
CompanionTypeNode child = (CompanionTypeNode) getChildAt(index);
child.removeCompanion(e.getElement());
}
@Override
public void elementAdded(ListEvent<CompanionFacade> e) {
addCompanion(e.getElement(), false);
}