@@ -240,7 +240,7 @@ |
||
240 | 240 | * |
241 | 241 | * @param array $keyX |
242 | 242 | * @param integer $threshold |
243 | - * @return array |
|
243 | + * @return string |
|
244 | 244 | * @throws RuntimeException |
245 | 245 | */ |
246 | 246 | protected function reverseCoefficients(array $keyX, $threshold) |