/**
* Loads the guide with the specified version and language.
* @param string $version
* @param string $language
* @return Guide the loaded guide, or null if the guide does not exist.
*/
public static function load($version, $language, $type = 'guide')
{
if (!in_array($type, ['guide', 'blogtut'])) {
return null;
}
$guide = new self($version, $language, $type);
if ($guide->validate() && $guide->loadIndex()) {
return $guide;
} else {
return null;
}
}
