Resolve #3407970 "Jsx debug expects"

Closes #3407970

modules/jsx_devel/src/JsxDebugUtility.php

@@ -35,7 +35,7 @@ class JsxDebugUtility {
   /**
    * Associates custom elements rendered by the JSX engine to debug data.
    *
-   * @param array $value
+   * @param array|object $value
    *   The custom element render array.
    * @param $filename
    *   The file name of the template being rendered.
@@ -43,7 +43,8 @@ class JsxDebugUtility {
    *    A unique ID for associating this element with a debug data available
    *    in JavaScript.
    */
-  static public function addJsxDebugInfo(array &$value, string $filename, string $uuid): void {
+  static public function addJsxDebugInfo(array|object &$value, string $filename, string $uuid): void {
+    $value = (array) $value;
     $value['data-drupal-prop-info'] = $uuid;
     $value['data-drupal-jsx-template'] = $filename;
   }