Alter Version

vendor/PhpSpreadsheet/Worksheet/HeaderFooterDrawing.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Worksheet;
+
+class HeaderFooterDrawing extends Drawing
+{
+    /**
+     * Get hash code.
+     *
+     * @return string Hash code
+     */
+    public function getHashCode()
+    {
+        return md5(
+            $this->getPath() .
+            $this->name .
+            $this->offsetX .
+            $this->offsetY .
+            $this->width .
+            $this->height .
+            __CLASS__
+        );
+    }
+}