original_string: protected function isNotModified($request, $file)
      {
          $modifiedSince = $request->getHeaderLine('If-Modified-Since');
          if (!$modifiedSince) {
              return false;
          }
  
          return strtotime($modifiedSince) === $file->lastChange();
      }
code: protected function isNotModified($request, $file)
      {
          $modifiedSince = $request->getHeaderLine('If-Modified-Since');
          if (!$modifiedSince) {
              return false;
          }
  
          return strtotime($modifiedSince) === $file->lastChange();
      }
code_tokens: protected function isNotModified ( $ request , $ file ) { $ modifiedSince = $ request -> getHeaderLine ( 'If-Modified-Since' ) ; if ( ! $ modifiedSince ) { return false ; } return strtotime ( $ modifiedSince ) === $ file -> lastChange ( ) ; }
docstring: Check the not modified header.
  
  @param \Psr\Http\Message\ServerRequestInterface $request The request to check.
  @param \Cake\Filesystem\File $file The file object to compare.
  @return bool
docstring_tokens: Check the not modified header .