297     def _do_update(self, path, known_checksum=None):  argument
316                 known_checksum,
320                 path, actual_inode, actual_mtime, actual_size, known_checksum
332         known_checksum=None,  argument
338                 path, actual_inode, actual_mtime, actual_size, known_checksum
361         known_checksum=None,  argument
363         if known_checksum:
364             md5, info = known_checksum, None
386         self, path, actual_inode, actual_mtime, actual_size, known_checksum  argument
388         if known_checksum:
389             md5, info = known_checksum, None
420     def update(self, path, known_checksum=None):  argument
431         return self._do_update(path, known_checksum)[0]