code: private function clear(array $options)
      {
          if (!file_exists($options['path'].'/summernote.js')) {
              return self::CLEAR_DROP;
          }
  
          if (null === $options['clear'] && null !== $options['notifier']) {
              $options['clear'] = $this->notify($options['notifier'], self::NOTIFY_CLEAR, $options['path']);
          }
  
          if (null === $options['clear']) {
              $options['clear'] = self::CLEAR_SKIP;
          }
  
          if (self::CLEAR_DROP === $options['clear']) {
              $files = new \RecursiveIteratorIterator(
                  new \RecursiveDirectoryIterator($options['path'], \RecursiveDirectoryIterator::SKIP_DOTS),
                  \RecursiveIteratorIterator::CHILD_FIRST
              );
  
              $this->notify($options['notifier'], self::NOTIFY_CLEAR_SIZE, iterator_count($files));
  
              foreach ($files as $file) {
                  $filePath = $file->getRealPath();
                  $this->notify($options['notifier'], self::NOTIFY_CLEAR_PROGRESS, $filePath);
  
                  if ($dir = $file->isDir()) {
                      $success = @rmdir($filePath);
                  } else {
                      $success = @unlink($filePath);
                  }
  
                  if (!$success) {
                      throw $this->createException(sprintf(
                          'Unable to remove the %s "%s".',
                          $dir ? 'directory' : 'file',
                          $filePath
                      ));
                  }
              }
  
              $this->notify($options['notifier'], self::NOTIFY_CLEAR_COMPLETE);
          }
  
          return $options['clear'];
      }
docs: @param mixed[] $options
  
  @return int