/**
* Creates a package instance based on a tracking code.
*
* @param string $tracking_code The package tracking code.
*
* @return Argo\Package
*/
public static function instance($tracking_code)
{
$tracking_code = preg_replace('/[^A-Z0-9]/i', '', $tracking_code);
$instance = new self();
$instance->tracking_code_original = $tracking_code;
$instance->tracking_code = $tracking_code;
return $instance->deduceTrackingCode();
}
