Destructor overriding

[Daylight]

I examined the Diagram Scene Example and faced this code:

void DiagramItem::removeArrows()
{
    foreach (Arrow *arrow, arrows) {
        arrow->startItem()->removeArrow(arrow);
        arrow->endItem()->removeArrow(arrow);
        scene()->removeItem(arrow);
        delete arrow;
    }
}

void DiagramItem::removeArrows()
{
    foreach (Arrow *arrow, arrows) {
        arrow->startItem()->removeArrow(arrow);
        arrow->endItem()->removeArrow(arrow);
        scene()->removeItem(arrow);
        delete arrow;
    }
}

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Where Arrow is:

class Arrow : public QGraphicsLineItem

class Arrow : public QGraphicsLineItem

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My question is, whether it is better to implement DiagramItem::removeArrows() method that way instead of overriding the Arrow's destructor:

Arrow::~Arrow() //Virtual destructor
{
    startItem()->removeArrow(this);
    endItem()->removeArrow(this);
 
}

Arrow::~Arrow() //Virtual destructor
{
    startItem()->removeArrow(this);
    endItem()->removeArrow(this);
    
}

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Then DiagramItem::removeArrows() would look like:

void DiagramItem::removeArrows()
{
    foreach (Arrow *arrow, arrows) {
        scene()->removeItem(this);
        delete arrow;
    }
}

void DiagramItem::removeArrows()
{
    foreach (Arrow *arrow, arrows) {
        scene()->removeItem(this);
        delete arrow;
    }
}

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