@@ -241,7 +241,7 @@ |
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241 | 241 | * |
242 | 242 | * @param array $keyX |
243 | 243 | * @param int $threshold |
244 | - * @return array |
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244 | + * @return string |
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245 | 245 | * @throws RuntimeException |
246 | 246 | */ |
247 | 247 | protected function reverseCoefficients(array $keyX, int $threshold): array |