Issue #3339527: Coding standards

modules/jsonapi_defaults/src/Controller/EntityResource.php

@@ -171,7 +171,7 @@ class EntityResource extends JsonApiEntityResourse {
       );
       throw new \LengthException($message);
     }
-    return isset($relatable_resource_types[0]) ? $relatable_resource_types[0] : NULL;
+    return $relatable_resource_types[0] ?? NULL;
   }
 
   /**
@@ -188,7 +188,7 @@ class EntityResource extends JsonApiEntityResourse {
     $keys = explode('#', $path);
 
     foreach ($keys as $key) {
-      $arr = &$arr[$key];
+      $arr = $arr[$key];
     }
 
     $arr = $value;