ItrMenu::getLastExistTrackItemId

public function getLastExistTrackItemId(): ?string
{
	$track = $this->getTrack();
	if (!empty($track))
	{
		$lastMenuItemId = end($track);
		do
		{
			if (
				$lastMenuItemId !== null
				&& $this->getItem($lastMenuItemId) !== null
			)
			{
				return $lastMenuItemId;
			}
			$lastMenuItemId = prev($track);
		}
		while ($lastMenuItemId !== null);
	}

	return null;
}