code: def Readdir(self, path, fh=None):
      
      if self.DataRefreshRequired(path):
        self._RunAndWaitForVFSFileUpdate(path)
  
      return super(GRRFuse, self).Readdir(path, fh=None)
docs: Updates the directory listing from the client.
  
      Args:
        path: The path to the directory to update. Client is inferred from this.
        fh: A file handler. Not used.
  
      Returns:
        A list of filenames.