From 18d72bf1c88caad11b7ca8c4e00b5647f2018191 Mon Sep 17 00:00:00 2001
From: Jan Tojnar <jtojnar@gmail.com>
Date: Wed, 8 Mar 2023 15:16:52 +0100
Subject: [PATCH] Use more precise return type for MessageInterface::getHeaders

It is an associative array with a string key (header name).
---
 src/MessageInterface.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/MessageInterface.php b/src/MessageInterface.php
index dd46e5e..a090222 100644
--- a/src/MessageInterface.php
+++ b/src/MessageInterface.php
@@ -61,7 +61,7 @@ public function withProtocolVersion($version);
      * While header names are not case-sensitive, getHeaders() will preserve the
      * exact case in which headers were originally specified.
      *
-     * @return string[][] Returns an associative array of the message's headers. Each
+     * @return array<string, string[]> Returns an associative array of the message's headers. Each
      *     key MUST be a header name, and each value MUST be an array of strings
      *     for that header.
      */