| @@ -92,7 +92,7 @@ | ||
| 92 | 92 | |
| 93 | 93 | /** | 
| 94 | 94 | * Get filter key | 
| 95 | - * @return mixed | |
| 95 | + * @return string | |
| 96 | 96 | */ | 
| 97 | 97 | public function getKey() | 
| 98 | 98 |  	{ |