update

vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Collection/CellsFactory.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Collection;
+
+use PhpOffice\PhpSpreadsheet\Settings;
+use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
+
+abstract class CellsFactory
+{
+    /**
+     * Initialise the cache storage.
+     *
+     * @param Worksheet $parent Enable cell caching for this worksheet
+     *
+     * @return Cells
+     * */
+    public static function getInstance(Worksheet $parent)
+    {
+        return new Cells($parent, Settings::getCache());
+    }
+}