MAGETWO-82004: MAGETWO-81245: Handling all setProductsFilter items in array as arguments magento#11500

 - Merge Pull Request magento#11500 from kirmorozov/magento2:MAGETWO-81245
 - Merged commits:
   1. 03c6d20

Author: Oleksii Korshenko

app/code/Magento/CatalogInventory/Model/ResourceModel/Stock/Item/StockItemCriteriaMapper.php

@@ -99,12 +99,9 @@ public function mapWebsiteFilter($website)
     /**
      * @inheritdoc
      */
-    public function mapProductsFilter($products)
+    public function mapProductsFilter(...$products)
     {
         $productIds = [];
-        if (!is_array($products)) {
-            $products = [$products];
-        }
         foreach ($products as $product) {
             if ($product instanceof \Magento\Catalog\Model\Product) {
                 $productIds[] = $product->getId();

app/code/Magento/CatalogInventory/Model/ResourceModel/Stock/Status/StockStatusCriteriaMapper.php

@@ -56,12 +56,9 @@ public function mapWebsiteFilter($website)
      * @param int|array|\Magento\Catalog\Model\Product|\Magento\Catalog\Model\Product[] $products
      * @return void
      */
-    public function mapProductsFilter($products)
+    public function mapProductsFilter(...$products)
     {
         $productIds = [];
-        if (!is_array($products)) {
-            $products = [$products];
-        }
         foreach ($products as $product) {
             if ($product instanceof \Magento\Catalog\Model\Product) {
                 $productIds[] = $product->getId();