From 6b7da103d74250cb20e02f49c6f3f5fd4e32c655 Mon Sep 17 00:00:00 2001
From: Evgeniy Koval <infinitely-young@users.noreply.github.com>
Date: Tue, 16 Jul 2019 11:40:01 +0300
Subject: [PATCH] Fix for multiple rules (Issue #350)

Suggested solution
---
 .../Transformer/Getters/MultipleElementsGetter.php         | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Facebook/InstantArticles/Transformer/Getters/MultipleElementsGetter.php b/src/Facebook/InstantArticles/Transformer/Getters/MultipleElementsGetter.php
index 8ecbba6d..eacaa108 100644
--- a/src/Facebook/InstantArticles/Transformer/Getters/MultipleElementsGetter.php
+++ b/src/Facebook/InstantArticles/Transformer/Getters/MultipleElementsGetter.php
@@ -31,7 +31,12 @@ public function get($node)
     {
         $fragment = $node->ownerDocument->createDocumentFragment();
         foreach ($this->children as $child) {
-            $cloned_node = Transformer::cloneNode($child->get($node));
+            $childNode = $child->get($node);
+            if ($childNode === null) {
+                continue;
+            }
+            $cloned_node = Transformer::cloneNode($childNode);
+            
             if (Type::is($cloned_node, 'DOMNode')) {
                 $fragment->appendChild($cloned_node);
             }