/**
  * {@inheritDoc}
  */
 public function size(Response $response, array $targets)
 {
     $response->incSize(0);
     foreach ($targets as $target) {
         if (is_dir($target)) {
             $this->size($response, glob($target . DIRECTORY_SEPARATOR . '*'));
         } else {
             $response->incSize(filesize($target));
         }
     }
 }