code: public function dump($files, $cacheFile, array $options = []): void
      {
          $buffer = $this->header;
          $type = $options['type'] ?? null;
  
          foreach ((array) $files as $file) {
              $buffer .= $this->loader->load($file, $type);
          }
  
          $this->filesystem->dumpFile($this->cacheDir.'/'.$cacheFile, $buffer);
      }
docs: {@inheritdoc}