/**
* Removes the item
* @param mixed $item
*/
function Remove($item)
{
$prev = $this->provider->PreviousOf($item);
$next = $this->provider->NextOf($item);
if ($next) {
$this->provider->SetPrevious($next, $prev);
}
$this->provider->Delete($item);
if ($next) {
$this->provider->Save($next);
}
}
/**
* Gets the next child
* @return mixed
*/
protected final function NextChild()
{
$child = $this->child;
$this->child = $this->tree->NextOf($this->child);
return $child;
}
