protected override void Write(RenderFragmentMarkdownRenderer renderer, HtmlEntityInline obj)
 => renderer.WriteText(obj.Transcoded.ToString());
 protected override void Write(RenderFragmentMarkdownRenderer renderer, LiteralInline obj)
 => renderer.WriteText(obj.Content.ToString());
 protected override void Write(RenderFragmentMarkdownRenderer renderer, DelimiterInline obj)
 => renderer.WriteText(obj.ToLiteral()).WriteChildren(obj);