code: public function generate(ReportSummary $reportSummary)
      {
          if (!\extension_loaded('dom')) {
              throw new \RuntimeException('Cannot generate report! `ext-dom` is not available!');
          }
  
          $dom = new \DOMDocument('1.0', 'UTF-8');
          $testsuites = $dom->appendChild($dom->createElement('testsuites'));
          /** @var \DomElement $testsuite */
          $testsuite = $testsuites->appendChild($dom->createElement('testsuite'));
          $testsuite->setAttribute('name', 'PHP CS Fixer');
  
          if (\count($reportSummary->getChanged())) {
              $this->createFailedTestCases($dom, $testsuite, $reportSummary);
          } else {
              $this->createSuccessTestCase($dom, $testsuite);
          }
  
          if ($reportSummary->getTime()) {
              $testsuite->setAttribute(
                  'time',
                  sprintf(
                      '%.3f',
                      $reportSummary->getTime() / 1000
                  )
              );
          }
  
          $dom->formatOutput = true;
  
          return $reportSummary->isDecoratedOutput() ? OutputFormatter::escape($dom->saveXML()) : $dom->saveXML();
      }
docs: {@inheritdoc}