[BaseCollection] Prepare elements while adding them by addMultiple() method in the same way as passing them in constructor

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 Common and useful classes, methods, exceptions etc.
 
+# 1.1.5
+
+1. [BaseCollection] Prepare elements while adding them by `addMultiple()` method in the same way as passing them in 
+   constructor.
+
 # 1.1.4
 
 1. [BaseCollection] Fix incorrectly working limit() method

VERSION

@@ -1 +1 @@
-1.1.4
+1.1.5

src/Collection/BaseCollection.php

@@ -84,7 +84,9 @@ abstract class BaseCollection implements CollectionInterface
             return;
         }
 
-        foreach ($elements as $index => $element) {
+        $prepared = $this->prepareElements($elements);
+
+        foreach ($prepared as $index => $element) {
             if ($useIndexes) {
                 $this->add($element, $index);