code: protected function registerMarkdownHtmlRenderer()
      {
          $app = $this->app;
  
          $app->singleton('commonmark.htmlrenderer', function ($app) {
              $environment = $app['commonmark.environment'];
  
              return new HtmlRenderer($environment);
          });
  
          $app->alias('commonmark.htmlrenderer', HtmlRenderer::class);
      }
docs: Register the CommonMark HTML Renderer.
  
  @return void