From a02f958b56e29e29cf6d8df52de4fc65e61f1e7d Mon Sep 17 00:00:00 2001
From: Carsten Brandt <mail@cebe.cc>
Date: Wed, 9 Feb 2022 13:36:31 +0100
Subject: [PATCH] Improve Responses resolving references

fixes #119
---
 src/spec/Responses.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/spec/Responses.php b/src/spec/Responses.php
index 5247603..a3623ae 100644
--- a/src/spec/Responses.php
+++ b/src/spec/Responses.php
@@ -242,10 +242,10 @@ public function resolveReferences(ReferenceContext $context = null)
                 /** @var Response|Reference|null $referencedObject */
                 $referencedObject = $response->resolve($context);
                 $this->_responses[$key] = $referencedObject;
-                if (!$referencedObject instanceof Reference && $referencedObject !== null) {
+                if (!$referencedObject instanceof Reference && $referencedObject instanceof SpecObjectInterface) {
                     $referencedObject->resolveReferences();
                 }
-            } else {
+            } elseif ($response instanceof SpecObjectInterface) {
                 $response->resolveReferences($context);
             }
         }