/**
* Reads a "collection" XML update source and picks the correct source URL
* for the extension update source.
*
* @param string $url The collection XML update source URL to read from
* @param string $jVersion Joomla! version to fetch updates for, or null to use JVERSION
*
* @return string The URL of the extension update source, or empty if no updates are provided / fetching failed
*/
public function getUpdateSourceFromCollection($url, $jVersion = null)
{
$provider = new Collection();
return $provider->getExtensionUpdateSource($url, 'file', 'joomla', $jVersion);
}
