|   |   | 
| $config.filename Returns the filename of an open config file | 
| Usage | 
| $config.filename(<id>) | 
| Description | 
| Returns the filename of the open config file identifier by <id>. <id> must be a valid config identifier returned by $config.open() If the <id> doesn't match any open file, an empty string is returned. | 
| See also | 
| config module documentation |