From 19b5abc171a3e4f23bc0753060f3e4756dfcf494 Mon Sep 17 00:00:00 2001
From: David Remer <webmaster@websupporter.net>
Date: Wed, 29 Mar 2023 07:24:52 +0300
Subject: [PATCH] Use array_keys $all to get the keys

[MAILPOET-4935]
---
 .../Engine/Control/SubjectTransformerHandler.php           | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/mailpoet/lib/Automation/Engine/Control/SubjectTransformerHandler.php b/mailpoet/lib/Automation/Engine/Control/SubjectTransformerHandler.php
index 562c321fa2..0859357661 100644
--- a/mailpoet/lib/Automation/Engine/Control/SubjectTransformerHandler.php
+++ b/mailpoet/lib/Automation/Engine/Control/SubjectTransformerHandler.php
@@ -60,12 +60,7 @@ class SubjectTransformerHandler {
       $all[$subject->getKey()] = $subject;
     }
 
-    $queue = array_map(
-      function(Subject $subject): string {
-        return $subject->getKey();
-      },
-      $subjects
-    );
+    $queue = array_keys($all);
     while ($key = array_shift($queue)) {
       foreach ($transformerMap[$key] ?? [] as $transformer) {
           $newKey = $transformer->returns();