--- vendor/symfony/http-foundation/HeaderBag.php.orig	2020-04-06 22:19:38.712454105 +0200
+++ ../../nya/HeaderBag.php	2020-04-06 12:46:41.651791103 +0200
@@ -18,8 +18,8 @@
  */
 class HeaderBag implements \IteratorAggregate, \Countable
 {
-    protected const UPPER = '_ABCDEFGHIJKLMNOPQRSTUVWXYZ';
-    protected const LOWER = '-abcdefghijklmnopqrstuvwxyz';
+    const UPPER = '_ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+    const LOWER = '-abcdefghijklmnopqrstuvwxyz';
 
     protected $headers = [];
     protected $cacheControl = [];