/**
  * @param $string
  *
  * @return string
  */
 public function formatPlain($string)
 {
     $groups = $this->formatParser->parseFormat($string);
     foreach ($groups as $group) {
         $tag = $group[0];
         $styleName = $group[1];
         if ($styleName === 'style' || $this->hasStyle($styleName)) {
             $string = str_replace($tag, '', $string);
         }
     }
     $string = $this->formatParser->unescapeTags($string);
     return $string;
 }