original_string: public function useFileDriver(string $dir): self
      {
          $this->setDriver(new \BearFramework\App\FileDataDriver($dir));
          return $this;
      }
code: public function useFileDriver(string $dir): self
      {
          $this->setDriver(new \BearFramework\App\FileDataDriver($dir));
          return $this;
      }
code_tokens: public function useFileDriver ( string $ dir ) : self { $ this -> setDriver ( new \ BearFramework \ App \ FileDataDriver ( $ dir ) ) ; return $ this ; }
docstring: Enables the file data driver using the directory specified.
  
  @param string $dir The directory used for file storage.
  @return self Returns a reference to itself.
docstring_tokens: Enables the file data driver using the directory specified .