| @@ -15,6 +15,9 @@ | ||
| 15 | 15 | |
| 16 | 16 | abstract public function storeMeasurement($prefix, $key, $value); | 
| 17 | 17 | |
| 18 | + /** | |
| 19 | + * @param string $prefix | |
| 20 | + */ | |
| 18 | 21 | abstract public function getMeasurements($prefix, array $keys); | 
| 19 | 22 | |
| 20 | 23 | } |