| @@ -98,7 +98,7 @@ | ||
| 98 | 98 | * | 
| 99 | 99 | * @param string $key The key to look up | 
| 100 | 100 | * | 
| 101 | - * @return null|mixed | |
| 101 | + * @return string | |
| 102 | 102 | */ | 
| 103 | 103 | protected function getKey($key) | 
| 104 | 104 |      { |