code: public function read($filename)
      {
          $meta = new ValueBag();
  
          try {
              $infos = $this->pdfFile->getInfo($filename);
  
              foreach ($infos as $key => $value) {
                  $meta->set(strtolower("pdfinfo.$key"), new MetaValue($value));
              }
          } catch (\Exception $e) {
          }
  
          return $meta;
      }
docs: {@inheritdoc}