code: public function register(Markdown $markdown)
      {
          $this->markdown = $markdown;
          $this->hash = '{gfm:table:escape(' . md5('|') . ')}';
  
          if ($this->getRenderer() instanceof HtmlRenderer) {
              // Output format depends on HTML for now
              $markdown->on('block', array($this, 'processTable'));
          }
      }
docs: {@inheritdoc}