code: private function createError(\DOMDocument $dom, $appliedFixer)
      {
          $error = $dom->createElement('error');
          $error->setAttribute('severity', 'warning');
          $error->setAttribute('source', 'PHP-CS-Fixer.'.$appliedFixer);
          $error->setAttribute('message', 'Found violation(s) of type: '.$appliedFixer);
  
          return $error;
      }
docs: @param \DOMDocument $dom
  @param string       $appliedFixer
  
  @return \DOMElement