@Override
protected void doAdd(int index, Vital element) {
element.addListener(this);
elementObserver.attachListener(element);
vitals.add(index, element);
numericList.forEach((fx) -> addNumeric(fx));
}
@Override
protected Vital doSet(int index, Vital element) {
Vital removed = vitals.set(index, element);
removed.removeListener(this);
elementObserver.detachListener(removed);
elementObserver.attachListener(element);
removed.addListener(this);
numericList.forEach((fx) -> addNumeric(fx));
return removed;
}