@protected
  void insertRenderObjectChild(covariant RenderObject child, covariant Object? slot) {
    assert(() {
      throw FlutterError.fromParts(<DiagnosticsNode>[
        ErrorSummary('RenderObjectElement.insertChildRenderObject() is deprecated.'),
        toDiagnosticsNode(
          name: 'insertChildRenderObject() was called on this Element',
          style: DiagnosticsTreeStyle.shallow,
        ),
        ErrorDescription(
          'insertChildRenderObject() has been deprecated in favor of '
          'insertRenderObjectChild(). See https://github.com/flutter/flutter/issues/63269 '
          'for details.',
        ),
        ErrorHint(
          'Rather than overriding insertChildRenderObject() in your '
          'RenderObjectElement subclass, override insertRenderObjectChild() instead, '
          "and DON'T call super.insertRenderObjectChild(). If you're implementing a "
          'new RenderObjectElement, you should override/implement '
          'insertRenderObjectChild(), moveRenderObjectChild(), and '
          'removeRenderObjectChild().',
        ),
      ]);
    }());
  }

@override
  void attachRenderObject(Object? newSlot) {
    assert(_ancestorRenderObjectElement == null);
    _slot = newSlot;
    _ancestorRenderObjectElement = _findAncestorRenderObjectElement();
    _ancestorRenderObjectElement?.insertRenderObjectChild(renderObject, newSlot);
    final ParentDataElement<ParentData>? parentDataElement = _findAncestorParentDataElement();
    if (parentDataElement != null) {
      _updateParentData(parentDataElement.widget as ParentDataWidget<ParentData>);
    }
  }