@@ -63,7 +63,7 @@ |
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63 | 63 | return $this->collection; |
64 | 64 | } |
65 | 65 | |
66 | - /** @return array Collection of table rows(materials) identifiers */ |
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66 | + /** @return string|null Collection of table rows(materials) identifiers */ |
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67 | 67 | protected function rowIDs() |
68 | 68 | { |
69 | 69 | // Get collection of nested materials |