Landing::activate

static function activate($lid, $block, $action)
{
	$result = new PublicActionResult();
	$landing = LandingCore::createInstance($lid);
	if ($landing->exist())
	{
		if ($action == 'show')
		{
			$result->setResult($landing->showBlock($block));
		}
		else
		{
			$result->setResult($landing->hideBlock($block));
		}
	}
	$result->setError($landing->getError());
	return $result;
}