From 85c40b9e98a9e13c149e45cc200f9fd05cadfe06 Mon Sep 17 00:00:00 2001
From: Alan Stanley <astanley@upei.ca>
Date: Fri, 20 Sep 2019 11:56:42 -0300
Subject: [PATCH] Syntax

---
 src/EventSubscriber/MediaLinkHeaderSubscriber.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/EventSubscriber/MediaLinkHeaderSubscriber.php b/src/EventSubscriber/MediaLinkHeaderSubscriber.php
index 16e286e2..18fe60eb 100644
--- a/src/EventSubscriber/MediaLinkHeaderSubscriber.php
+++ b/src/EventSubscriber/MediaLinkHeaderSubscriber.php
@@ -71,7 +71,8 @@ class MediaLinkHeaderSubscriber extends LinkHeaderSubscriber implements EventSub
     $source_field = $type_configuration['source_field'];
 
     if (empty($source_field) ||
-        !$media->hasField($source_field)
+      !$media->hasField($source_field) ||
+        !method_exists($media->get($source_field), 'referencedEntities')
     ) {
       return $links;
     }