Alter Version

vendor/PhpSpreadsheet/Shared/Escher/DgContainer/SpgrContainer.php

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+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Shared\Escher\DgContainer;
+
+class SpgrContainer
+{
+    /**
+     * Parent Shape Group Container.
+     *
+     * @var \PhpOffice\PhpSpreadsheet\Shared\Escher\DgContainer\SpgrContainer
+     */
+    private $parent;
+
+    /**
+     * Shape Container collection.
+     *
+     * @var array
+     */
+    private $children = [];
+
+    /**
+     * Set parent Shape Group Container.
+     *
+     * @param \PhpOffice\PhpSpreadsheet\Shared\Escher\DgContainer\SpgrContainer $parent
+     */
+    public function setParent($parent): void
+    {
+        $this->parent = $parent;
+    }
+
+    /**
+     * Get the parent Shape Group Container if any.
+     *
+     * @return null|\PhpOffice\PhpSpreadsheet\Shared\Escher\DgContainer\SpgrContainer
+     */
+    public function getParent()
+    {
+        return $this->parent;
+    }
+
+    /**
+     * Add a child. This will be either spgrContainer or spContainer.
+     *
+     * @param mixed $child
+     */
+    public function addChild($child): void
+    {
+        $this->children[] = $child;
+        $child->setParent($this);
+    }
+
+    /**
+     * Get collection of Shape Containers.
+     */
+    public function getChildren()
+    {
+        return $this->children;
+    }
+
+    /**
+     * Recursively get all spContainers within this spgrContainer.
+     *
+     * @return SpgrContainer\SpContainer[]
+     */
+    public function getAllSpContainers()
+    {
+        $allSpContainers = [];
+
+        foreach ($this->children as $child) {
+            if ($child instanceof self) {
+                $allSpContainers = array_merge($allSpContainers, $child->getAllSpContainers());
+            } else {
+                $allSpContainers[] = $child;
+            }
+        }
+
+        return $allSpContainers;
+    }
+}