add element child list

backend/app/Element/UseCases/GetElement/GetElementResult.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Element\UseCases\GetElement;
+
+use App\Element\Element;
+
+class GetElementResult
+{
+    /**
+     * @param Element[] $childElements
+     */
+    public function __construct(
+        private Element $element,
+        private array $childElements,
+    ) {
+    }
+
+    public function getElement(): Element
+    {
+        return $this->element;
+    }
+
+    /**
+     * @return Element[]
+     */
+    public function getChildElements(): array
+    {
+        return $this->childElements;
+    }
+}