From 610d78a5eb7b00ae9fe65b9435e51cc376da00f4 Mon Sep 17 00:00:00 2001
From: Kevin Ryser <kevin@unusualstudio.co>
Date: Wed, 17 Jan 2024 14:31:04 +0000
Subject: [PATCH] Fix fatal error when headers is null (#128)

Headers defaults to "null" if empty, and "fixHeaders" can return null
too. Then we should allow "null" for the setHeaders function.
---
 src/Postmark/Models/PostmarkMessageBase.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Postmark/Models/PostmarkMessageBase.php b/src/Postmark/Models/PostmarkMessageBase.php
index 76bce7ef..3f67c756 100644
--- a/src/Postmark/Models/PostmarkMessageBase.php
+++ b/src/Postmark/Models/PostmarkMessageBase.php
@@ -134,7 +134,7 @@ public function getHeaders(): mixed
         return $this->Headers;
     }
 
-    public function setHeaders(array $Headers): PostmarkMessageBase
+    public function setHeaders(?array $Headers): PostmarkMessageBase
     {
         $this->Headers = $Headers;