private function UpdateInsertItem($item, $parent, $previous)
{
if ($previous) {
$oldPrevNext = $this->provider->NextOf($previous);
if ($oldPrevNext) {
$this->provider->SetPrevious($oldPrevNext, $item);
$this->provider->Save($oldPrevNext);
}
}
$this->provider->SetParent($item, $parent);
$this->provider->SetPrevious($item, $previous);
$this->provider->Save($item);
}
