code: public function setHtml($html = '', $clear = false)
      {
          if (true===$clear) {
              $this->clear('text');
          }
          $this->html .= Helper::formatText($html, 'ascii');
          return $this;
      }
docs: Set HTML version
  
  @param string $html The HTML content
  @param bool $clear Clear a set content first ? (default is to append a content)
  @return self