public function __construct($url_part = null, $callback_url = null, $oauth_settings = null)
{
if (isset($url_part)) {
self::$url_part = $url_part;
}
if (isset($callback_url)) {
self::$callback_url = $callback_url;
}
if (isset($oauth_settings)) {
parent::__construct($oauth_settings);
}
}
