Index: modules/thunder_updater/src/ReversibleConfigDiffer.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- modules/thunder_updater/src/ReversibleConfigDiffer.php	(revision 85781d23b5b79c566731a42f2019f54cee59b125)
+++ modules/thunder_updater/src/ReversibleConfigDiffer.php	(revision )
@@ -84,7 +84,7 @@
   /**
    * {@inheritdoc}
    */
-  protected function format($config, $prefix = '') {
+  protected function format(array $config, $prefix = '') {
     return $this->configDiffTransformer->transform($config, $prefix);
   }