/**
* Return an instance of this class.
*
* @return object A single instance of this class.
*
* @since 1.3
* @version 1.3.7
*
*/
public static function get_instance()
{
// If the single instance hasn't been set, set it now.
if (null == self::$instance) {
self::$instance = new self();
}
return self::$instance;
}
