code: protected function applyFix(\SplFileInfo $file, Tokens $tokens)
      {
          // no assertions to be fixed - fast return
          if (empty($this->configuration['assertions'])) {
              return;
          }
  
          foreach ($this->configuration['assertions'] as $assertionMethod) {
              $assertionFixer = self::$assertionFixers[$assertionMethod];
  
              for ($index = 0, $limit = $tokens->count(); $index < $limit; ++$index) {
                  $index = $this->{$assertionFixer}($tokens, $index, $assertionMethod);
  
                  if (null === $index) {
                      break;
                  }
              }
          }
      }
docs: {@inheritdoc}