Jackalope\Node::setDirty PHP Method

    public function setDirty($keepChanges = false, $targetState = false)
    {
        parent::setDirty($keepChanges, $targetState);
        foreach ($this->properties as $property) {
            if ($keepChanges && self::STATE_NEW !== $property->getState()) {
                // if we want to keep changes, we do not want to set new properties dirty.
                $property->setDirty($keepChanges, $targetState);
            }
        }
    }