class_docstr: A converter that handles simple rename.
class_docstr_tok: ["A","converter","that","handles","simple","rename","."]
code: def downgrade(cls, cfg: CN) -> None:
      for old, new in cls.RENAME[::-1]:
          _rename(cfg, new, old)
  
file_path: detectron2/detectron2/config/compat.py
imports: import logging
  from typing import List, Optional, Tuple
  from .config import CfgNode
  from .defaults import _C
label_desc: Use image node_id 2 for calling the _RenameConverter obj's underlying member method code with example usage: obj.downgrade(cls, cfg) without return types