Correct return type of methods

Author: mage2pratik

app/code/Magento/CatalogSearch/Model/Indexer/Fulltext/Action/DataProvider.php

@@ -538,7 +538,7 @@ private function getProductEmulator($typeId)
      * @param array $indexData
      * @param array $productData
      * @param int $storeId
-     * @return string
+     * @return array
      * @SuppressWarnings(PHPMD.CyclomaticComplexity)
      * @since 100.0.3
      */