@Override
public boolean retainAll(final Collection<?> c) {
final Set<C> uniqueElementsToRemove = SetElements.difference(this, c);
final boolean result = super.retainAll(uniqueElementsToRemove);
if (result) {
final Set<C> uniqueRemovedElements = SetElements.intersection(this, uniqueElementsToRemove);
setChildrenParent(uniqueRemovedElements, null);
}
return result;
}
@Override
public boolean addAll(final int index, final Collection<? extends C> c) {
final Set<? extends C> uniqueElementsToAdd = SetElements.difference(c, this);
final boolean result = super.addAll(index, c);
if (result) {
final Set<C> uniqueAddedElements = SetElements.intersection(this, uniqueElementsToAdd);
updateChildrenParent(uniqueAddedElements);
}
return result;
}