From 41417ce8a6b50ae8ea2a86eef621b15e5b800d6f Mon Sep 17 00:00:00 2001
From: Niels Vanpachtenbeke <10651054+Nielsvanpach@users.noreply.github.com>
Date: Mon, 13 Dec 2021 14:58:46 +0100
Subject: [PATCH] mute deprecation warnings on 8.1

---
 src/Sheet.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Sheet.php b/src/Sheet.php
index 009b306..6639ac5 100644
--- a/src/Sheet.php
+++ b/src/Sheet.php
@@ -53,21 +53,24 @@ public function __toString(): string
         return $this->toJson();
     }
 
-    public function offsetExists($key)
+    public function offsetExists($key): bool
     {
         return ! is_null($this->getAttribute($key));
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetGet($key)
     {
         return $this->getAttribute($key);
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetSet($key, $value)
     {
         $this->$key = $value;
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetUnset($key)
     {
         unset($this->attributes[$key]);