code: public function process(File $phpcsFile, $stackPtr)
      {
          $tokens = $phpcsFile->getTokens();
  
          $error   = 'Use of the "%s" keyword is forbidden';
          $data    = [$tokens[$stackPtr]['content']];
  
          $phpcsFile->addError($error, $stackPtr, 'NotAllowed', $data);
          $phpcsFile->recordMetric($stackPtr, 'Abstract or protected used', 'yes');
      }
docs: {@inheritdoc}